NPI registry status
Active
2026 NPPES data Adult Reconstructive Orthopaedic Surgery Physician NPI 1396734505 MD
Verify on CMS → Christopher Chen, MD
Adult Reconstructive Orthopaedic Surgery Physician in Berkeley, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,254 in Adult Reconstructive Orthopaedic Surgery 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
592
Medicare Part D claims · 221 beneficiaries · Adult Reconstructive Orthopaedic Surgery Physician avg: 493
Generic prescribing
96%
generic claims · 4% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
77.1/100
▼ 6 pts below national avg 83.1 · Above neutral
Industry payments
$7.2K
3 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Christopher Chen, MD reported a CMS MIPS final score of 77.1/100 - below the 83.1 national average - and filed 592 Medicare Part D claims in 2023.
- 77.1/100
- MIPS score · -6 vs avg
- 592
- Part D claims, 2023
- 96%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Christopher Chen, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
77 24th percentile higher than 24% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Christopher Chen, MD sits
This provider among adult reconstructive orthopaedic surgery physician peers
Across the 496 adult reconstructive orthopaedic surgery physician providers who report both Medicare Part D prescribing and a MIPS quality score, Christopher Chen, MD writes more Part D claims than 61% of them and scores higher on MIPS quality than 40% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one adult reconstructive orthopaedic surgery physician peer from a representative sample of 60; the gold marker is Christopher Chen, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Christopher Chen, MD 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 Christopher Chen, MD?
Below national averagePrimary specialty
Adult Reconstructive Orthopaedic Surgery Physician
Medicare Part D claims
592 20% vs specialty avg
MIPS final score
77.1/100 6 pts vs avg
Specialty distribution in California
How Adult Reconstructive Orthopaedic Surgery Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Christopher Chen, MD's 2023 MIPS final score plotted against the Adult Reconstructive Orthopaedic Surgery Physician national average
- MIPS Final Score
- 77.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Adult Reconstructive Orthopaedic Surgery Physician) - 77.1/100 vs national avg 83.1
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).
Christopher Chen, MD appears in the CMS NPPES registry as an Adult Reconstructive Orthopaedic Surgery Physician provider holding MD credentials at 3000 COLBY ST, Berkeley, CA, 94705, with a listed phone of (510) 647-1200. NPI 1396734505 was issued on 10/19/2005.
Medicare Part D records for calendar year 2023 show 592 prescription claims written by this provider, covering 221 Medicare beneficiaries and totaling roughly $12K in drug spend, split 4% brand-name and 96% generic by claim count, with an opioid prescribing rate of 31.3%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 77.1/100 for the 2023 performance year (Quality 54.3), compared with the national average of 83.1.
Adult Reconstructive Orthopaedic Surgery Physician is a narrow specialty nationwide, with 1,254 enrolled providers across 51 states and an average of 493 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
Provider Details
| NPI | 1396734505 |
|---|---|
| Specialty | Adult Reconstructive Orthopaedic Surgery Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/19/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
77.1376
Final Score
Avg: 83.1
54.2751
Quality
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 Christopher Chen, MD. Source: openpaymentsdata.cms.gov.
Total received
$7.2K
Largest payer
Pharmacosmos Therapeutics 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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Christopher Chen, MD. To verify Christopher Chen, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Christopher Chen, MD - brand share 4.0%
Adult Reconstructive Orthopaedic Surgery Physician average
4% brand-name claims vs 96% generic, on 592 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.
592
Total Claims
$12K
Total Drug Cost
221
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 608
- Total Day Supply
- 8,670
- Brand vs Generic
- 4% brand / 96% generic
- Brand Drug Cost
- $7K
- Generic Drug Cost
- $5K
- Opioid Claims
- 185 (31.3% rate)
- Antibiotic Claims
- 135
Patient Demographics
- Average Patient Age
- 76.0 years
- Avg HCC Risk Score
- 0.80
- Gender Split
- 74% female / 26% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Christopher Chen, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Meloxicam
Meloxicam
197 claims
- Oxycodone-Acetamin…
Oxycodone-Acetaminophen
151 claims
- Amoxicillin
Amoxicillin
93 claims
- Cephalexin 23
Cephalexin
23 claims
- Celecoxib 19
Celecoxib
19 claims
- Eliquis 18
Eliquis
18 claims
- Tramadol Hcl 17
Tramadol Hcl
17 claims
- Azithromycin 15
Azithromycin
15 claims
| Drug | Claims |
|---|---|
| Meloxicam | 197 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 151 |
| Amoxicillin | 93 |
| Cephalexin | 23 |
| Celecoxib | 19 |
| Eliquis Apixaban | 18 |
| Tramadol Hcl | 17 |
| Azithromycin | 15 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Adult Reconstructive Orthopaedic Surgery Physician in CA →
All providers in California →
Compare specialties →
Adult Reconstructive Orthopaedic Surgery Physician Overview
How Christopher Chen, MD fits within the Adult Reconstructive Orthopaedic Surgery Physician landscape nationally.
1,254
Adult Reconstructive Orthopaedic Surgery Physician Providers in US
51
States with Adult Reconstructive Orthopaedic Surgery Physician
493
Avg Claims per Provider
Christopher Chen, MD's 592 claims are above the specialty average of 493.
Nearby Adult Reconstructive Orthopaedic Surgery Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Chen.
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Adult Reconstructive Orthopaedic Surgery Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Christopher Chen, MD's specialty? ▼
Christopher Chen, MD specializes in Adult Reconstructive Orthopaedic Surgery Physician and practices in Berkeley, California. Credentials: MD.
How much does Christopher Chen, MD prescribe under Medicare Part D? ▼
In 2023, Christopher Chen, MD wrote 592 Medicare Part D claims totaling $12K in drug costs for 221 beneficiaries.
What is Christopher Chen, MD's Medicare quality score? ▼
Christopher Chen, MD has a CMS MIPS Final Score of 77.1/100 (Quality: 54.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Christopher Chen, MD located? ▼
Christopher Chen, MD is located at 3000 COLBY ST, Berkeley, CA, 94705. Phone: (510) 647-1200.
What is Christopher Chen, MD's NPI number? ▼
Christopher Chen, MD's National Provider Identifier (NPI) is 1396734505, issued on 10/19/2005.
Does Christopher Chen, MD prescribe more brand-name or generic drugs? ▼
Christopher Chen, MD's prescribing is 4% brand-name and 96% generic drugs by claim count, with $7K in brand drug costs.
Does Christopher Chen, MD prescribe opioids? ▼
Yes, Christopher Chen, MD had 185 opioid claims in 2023 with an opioid prescribing rate of 31.3%.
How many Adult Reconstructive Orthopaedic Surgery Physician providers are there in the US? ▼
There are 1,254 Adult Reconstructive Orthopaedic Surgery Physician providers across 51 states in the US. The average Adult Reconstructive Orthopaedic Surgery Physician provider writes 493 Medicare Part D claims per year.
What drugs does Christopher Chen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Christopher Chen, MD's most frequently prescribed drugs include Meloxicam, Oxycodone-Acetaminophen, Amoxicillin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Christopher Chen, MD accept Medicare? ▼
Christopher Chen, MD appears in CMS Medicare data with 592 Part D claims and 221 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Christopher Chen, MD's credentials? ▼
Christopher Chen, MD's NPI is 1396734505 with credentials MD. 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 (2023). 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 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
Compiled from official public sources by the PlainDoctor editorial team.
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 May 2026.