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2026 NPPES data Orthopaedic Surgery of the Spine Physician NPI 1588640361 M.D.
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Michael Chang, M.D.

Orthopaedic Surgery of the Spine Physician in Yakima, Washington.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,825 in Orthopaedic Surgery of the Spine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
840
Medicare Part D claims · 276 beneficiaries · Orthopaedic Surgery of the Spine Physician avg: 380
MIPS score
25.6/100
▼ 58 pts below national avg 83.5 · Below average
Industry payments
$4.0K
6 payments · CMS Open Payments (Sunshine Act)
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Michael Chang, M.D. reported a CMS MIPS final score of 25.6/100 - below the 83.5 national average - and filed 840 Medicare Part D claims in 2024.

25.6/100
MIPS score · -58 vs avg
840
Part D claims, 2024
Likely
board-certified (heuristic)
≥3rd
pct among measured MIPS (lower-bound band)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.

Federal trust snapshot

What official records show about Michael Chang, M.D.

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1588640361), first enumerated 12/22/2005.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 840 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 25.6/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • Reported

    Industry payment transparency

    $4.0K in reported industry payments (6 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.

    Source: CMS Open Payments

  • State context

    State board disciplinary context

    Washington statewide board action statistics are published annually — these figures describe aggregate state activity, not Michael Chang, M.D.'s individual license status. Verify directly with the state medical board.

    Source: WMC annual report 2023

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

CMS NPPES provider registry desk

NPI 1588640361 · Orthopaedic Surgery of the Spine Physician

NPI-10 · ENUM-LEGACY · TAX-NARROW · MIPS-LOW · RX-LIGHT · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1588640361
  • ENUM-LEGACY 2005
  • TAX-NARROW 1,825
  • MIPS-LOW 25.6/100
  • RX-LIGHT 840
  • BOOK-THIN 47 in Washington
  • PHOTO-FINISH Stephen James, D.O. · ±0.5

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Michael Chang, M.D.'s MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

26 ≥ 3rd percentile 3% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). This entry sits in this band. 30–40: 2,746 measured providers (1%). Above this entry. 40–50: 2,928 measured providers (1%). Above this entry. 50–60: 5,882 measured providers (1%). Above this entry. 60–70: 13,906 measured providers (3%). Above this entry. 70–80: 94,570 measured providers (21%). Above this entry. 80–90: 129,887 measured providers (29%). Above this entry. 90+: 189,403 measured providers (42%). Above this entry. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Michael Chang, M.D. sits

This provider among orthopaedic surgery of the spine physician peers

Across the 562 orthopaedic surgery of the spine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Michael Chang, M.D. writes more Part D claims than 86% of them and scores higher on MIPS quality than 7% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.448.873.297.7Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 72Michael Chang, M.D., Part D claim volume, percentile in specialty: 86 · MIPS quality, percentile: 7
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one orthopaedic surgery of the spine physician peer from a representative sample of 60; the gold marker is Michael Chang, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Michael Chang, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Michael Chang, M.D.?

Below national average

NPI registry status

Active

Issued 12/22/2005

NPI 1588640361

Primary specialty

Orthopaedic Surgery of the Spine Physician

Niche

1,825 US NPIs in this specialty

Medicare Part D claims

840 121% vs specialty avg

2024 prescription claims

Specialty avg: 380

MIPS final score

25.6/100 57.9 pts vs avg

Below average band

vs 83.5 national avg

Specialty distribution in Washington

How Orthopaedic Surgery of the Spine Physician compares to other specialties among Washington providers

Washington providers
Mental Health Counselor8.5%Massage Therapist6.4%Counselor5.7%Behavior Technician4.7%Pharmacist3.8%Physical Therapist3.6%Orthopaedic Surgery of the S…0%
Largest specialties in Washington (% of in-state providers)

Medicare quality performance, MIPS

Michael Chang, M.D.'s 2023 MIPS final score plotted against the Orthopaedic Surgery of the Spine Physician national average

Below national average
MIPS Final Score
25.6/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%25.6%
MIPS final score (Orthopaedic Surgery of the Spine Physician) - 25.6/100 vs national avg 83.5
How MIPS and board certification work

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

Practice Address

111 S 11TH AVE STE 320
Yakima, WA 98902
(509) 454-8888

Provider Details

NPI 1588640361
Specialty Orthopaedic Surgery of the Spine Physician
Credentials M.D.
Gender Male
NPI Issued 12/22/2005

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

25.618
Final Score
Measured-score avg: 83.5
0
Quality
85.3932
Cost
0
Promoting Interoperability

Reporting: Individual

Industry payments received (2024) - CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Michael Chang, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$4.0K

Largest payer

Orthofix Medical, Inc.

Most common payment type

Consulting Fee

Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

License & disciplinary context - Washington WMC 2023 annual report

Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~34K Washington medical licensees in 2023 - they are NOT specific to Michael Chang, M.D.. To verify Michael Chang, M.D.'s current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases

WMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2024.

840
Total Claims
$9K
Total Drug Cost
276
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
857.3
Total Day Supply
13,570
Generic Drug Cost
$9K
Opioid Claims
139 (16.5% rate)
Antibiotic Claims
15

Patient Demographics

Average Patient Age
70.7 years
Avg HCC Risk Score
0.92
Gender Split
59% female / 41% male
Age Distribution
<65: 48, 65-74: 131, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.

What Michael Chang, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2024

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2024
Drug Claims
Baclofen
 217
Methocarbamol
 197
Oxycodone Hcl
 126
Gabapentin
 79
Ondansetron Odt
Ondansetron
73
Methylprednisolone
 64
Cyclobenzaprine Hcl
 12
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

More Orthopaedic Surgery of the Spine Physician in WA → All providers in Washington → Compare specialties →

Orthopaedic Surgery of the Spine Physician Overview

How Michael Chang, M.D. fits within the Orthopaedic Surgery of the Spine Physician landscape nationally.

1,825
Orthopaedic Surgery of the Spine Physician Providers in US
51
States with Orthopaedic Surgery of the Spine Physician
380
Avg Claims per Provider

Michael Chang, M.D.'s 840 claims are above the specialty average of 380.

Nationwide Orthopaedic Surgery of the Spine Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Chang, both outside Washington so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (25.6 here).

Stephen James 26.1 FL Justin Miller 26.3 IN Alexander Hughes 24.9 NY Paul Kraemer 26.8 IN

Same NPPES enumeration year (2005)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Roy Ashford Pasadena, CA Fred Sweet Rockford, IL Henry Barnard Albany, GA Paul McDonough Abilene, TX

Nearby Orthopaedic Surgery of the Spine Physician Providers in Washington

Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Chang.

One of 47 Orthopaedic Surgery of the Spine Physician providers enrolled in Washington, 5 are shown here.

Dr. Farouq Al-Hamdan
MD
Mount Vernon, WA
Dr. Hagay Amster Kahn
MD
Seattle, WA
Andrew Bachinskas
Seattle, WA
Dr. Kody Barrett
M.D.
Edmonds, WA
Dr. Kyle Behrens
MD
Seattle, WA

Compare Orthopaedic Surgery of the Spine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Michael Chang, M.D.'s specialty? ▼
Michael Chang, M.D. specializes in Orthopaedic Surgery of the Spine Physician and practices in Yakima, Washington. Credentials: M.D..
How much does Michael Chang, M.D. prescribe under Medicare Part D? ▼
In 2024, Michael Chang, M.D. wrote 840 Medicare Part D claims totaling $9K in drug costs for 276 beneficiaries.
What is Michael Chang, M.D.'s Medicare quality score? ▼
Michael Chang, M.D. has a CMS MIPS Final Score of 25.6/100 (Quality: 0, Cost: 85.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Michael Chang, M.D. located? ▼
Michael Chang, M.D. is located at 111 S 11TH AVE STE 320, Yakima, WA, 98902. Phone: (509) 454-8888.
What is Michael Chang, M.D.'s NPI number? ▼
Michael Chang, M.D.'s National Provider Identifier (NPI) is 1588640361, issued on 12/22/2005.
Does Michael Chang, M.D. prescribe opioids? ▼
Yes, Michael Chang, M.D. had 139 opioid claims in 2024 with an opioid prescribing rate of 16.5%.
How many Orthopaedic Surgery of the Spine Physician providers are there in the US? ▼
There are 1,825 Orthopaedic Surgery of the Spine Physician providers across 51 states in the US. The average Orthopaedic Surgery of the Spine Physician provider writes 380 Medicare Part D claims per year.
What drugs does Michael Chang, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Michael Chang, M.D.'s most frequently prescribed drugs include Baclofen, Methocarbamol, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Chang, M.D. accept Medicare? ▼
Michael Chang, M.D. appears in CMS Medicare data with 840 Part D claims and 276 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Chang, M.D.'s credentials? ▼
Michael Chang, M.D.'s NPI is 1588640361 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

View source datasets and methodology notes
Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.