2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1689675852 M.D.
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CHANG KANG, M.D.

Geriatric Medicine (Internal Medicine) Physician in GOLDEN, Colorado. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
10K
Medicare Part D claims · 353 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$39.99
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: CHANG KANG, M.D. is a Geriatric Medicine (Internal Medicine) Physician ([object Object]) practicing in GOLDEN, Colorado with a Medicare Part D prescribing footprint of 10K claims across 353 beneficiaries — 19% brand-name prescribing . Industry payments of $39.99 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: CHANG KANG, M.D. filed 10,300 Medicare Part D claims in 2023 across GOLDEN, Colorado. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

CHANG KANG, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

CHANG KANG, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 08/09/2005

NPI 1689675852

Primary specialty

Geriatric Medicine (Internal Medicine) Physician

Niche

4,161 US NPIs in this specialty

Medicare Part D claims

10,300 131% vs specialty avg

2023 prescription claims

Specialty avg: 4,450

Specialty distribution in Colorado

How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Colorado providers

Colorado providers

Geriatric Medicine (Internal Medicine) Physician share within Colorado

1. Geriatric Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Internal Medicine) Physician share within Colorado

Specialty board-certification context

Estimated specialty board-certified rate — Geriatric Medicine (Internal Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Geriatric Medicine (Internal Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Geriatric Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Geriatric Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

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).

CHANG KANG, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider practicing in GOLDEN, Colorado, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1689675852. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

CHANG KANG, M.D. appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding M.D. credentials at 5920 MCINTYRE ST, GOLDEN, CO, 80403, with a listed phone of (303) 949-1250. NPI 1689675852 was issued on 08/09/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KANG most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 10,300 prescription claims written by this provider, covering 353 Medicare beneficiaries and totaling roughly $918K in drug spend, split 19% brand-name and 81% generic by claim count, with an opioid prescribing rate of 2.3%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 enrolled providers across 52 states and an average of 4,450 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

5920 MCINTYRE ST
GOLDEN, CO 80403

Provider Details

NPI 1689675852
Specialty Geriatric Medicine (Internal Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 08/09/2005

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 CHANG KANG, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$40

Largest payer

PFIZER INC.

Most common payment type

Education

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.

Brand vs generic prescribing mix · Typical

CHANG KANG, M.D. — brand share 19.0%
Specialty average (est.)

19% brand-name claims vs 81% generic, on 10,300 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

10,300
Total Claims
$918K
Total Drug Cost
353
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
10,350
Total Day Supply
232,593
Brand vs Generic
19% brand / 81% generic
Brand Drug Cost
$697K
Generic Drug Cost
$219K
Opioid Claims
236 (2.3% rate)
Antibiotic Claims
200

Patient Demographics

Average Patient Age
79.8 years
Avg HCC Risk Score
2.93
Gender Split
66% female / 34% male
Age Distribution
<65: 24, 65-74: 72, 75-84: 134, 85+: 123

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Furosemide
571
Atorvastatin Calcium
553
Levothyroxine Sodium
468
Eliquis
Apixaban
450
Gabapentin
315
Lisinopril
310
Tamsulosin Hcl
268
Metoprolol Tartrate
266
Sertraline Hcl
259
Potassium Chloride
257

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

Geriatric Medicine (Internal Medicine) Physician Overview

How CHANG KANG, M.D. fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.

4,161
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider

CHANG KANG, M.D.'s 10,300 claims are above the specialty average of 4,450.

Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Colorado

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

Compare Geriatric Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is CHANG KANG, M.D.'s specialty?
CHANG KANG, M.D. specializes in Geriatric Medicine (Internal Medicine) Physician and practices in GOLDEN, Colorado. Credentials: M.D..
How much does CHANG KANG, M.D. prescribe under Medicare Part D?
In 2023, CHANG KANG, M.D. wrote 10,300 Medicare Part D claims totaling $918K in drug costs for 353 beneficiaries.
Where is CHANG KANG, M.D. located?
CHANG KANG, M.D. is located at 5920 MCINTYRE ST, GOLDEN, CO, 80403. Phone: (303) 949-1250.
What is CHANG KANG, M.D.'s NPI number?
CHANG KANG, M.D.'s National Provider Identifier (NPI) is 1689675852, issued on 08/09/2005.
Does CHANG KANG, M.D. prescribe more brand-name or generic drugs?
CHANG KANG, M.D.'s prescribing is 19% brand-name and 81% generic drugs by claim count, with $697K in brand drug costs.
Does CHANG KANG, M.D. prescribe opioids?
Yes, CHANG KANG, M.D. had 236 opioid claims in 2023 with an opioid prescribing rate of 2.3%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US?
There are 4,161 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does CHANG KANG, M.D. prescribe most often?
Based on 2023 Medicare Part D data, CHANG KANG, M.D.'s most frequently prescribed drugs include Furosemide, Atorvastatin Calcium, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHANG KANG, M.D. accept Medicare?
CHANG KANG, M.D. appears in CMS Medicare data with 10,300 Part D claims and 353 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHANG KANG, M.D.'s credentials?
CHANG KANG, M.D.'s NPI is 1689675852 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

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 (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
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 April 2026 (NPPES) / 2023 (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