2026 NPPES data Dermatology Physician NPI 1891827788 MD
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PETER CHAM, MD

Dermatology Physician in SAN JOSE, California. 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
717
Medicare Part D claims · 268 beneficiaries · Dermatology Physician avg: 729
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

PETER CHAM, MD filed 717 Medicare Part D claims in 2023 as a Dermatology Physician in SAN JOSE, California, prescribing 80% generic.

717
Part D claims, 2023
80%
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.

PETER CHAM, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

717 Top 29% higher than 71% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

PETER CHAM, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — 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 PETER CHAM, MD?

Quality data not reported

NPI registry status

Active

Issued 03/09/2007

NPI 1891827788

Primary specialty

Dermatology Physician

Mid-sized

14,610 US NPIs in this specialty

Medicare Part D claims

717 2% vs specialty avg

2023 prescription claims

Specialty avg: 729

Specialty distribution in California

How Dermatology Physician compares to other specialties among California providers

California providers

Dermatology Physician share within California

1. Dermatology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Dermatology Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Dermatology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Dermatology Physician ABMS/AOA estimate

Est. board-certified rate (Dermatology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Dermatology 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).

PETER CHAM, MD is a Dermatology Physician provider practicing in SAN JOSE, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1891827788. 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.

PETER CHAM, MD appears in the CMS NPPES registry as a Dermatology Physician provider holding MD credentials at 276 INTERNATIONAL CIRCLE, SAN JOSE, CA, 95119, with a listed phone of (408) 972-3590. NPI 1891827788 was issued on 03/09/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHAM 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 717 prescription claims written by this provider, covering 268 Medicare beneficiaries and totaling roughly $480K in drug spend, split 20% brand-name and 80% generic by claim count. 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.

Dermatology Physician is a mid-sized specialty nationwide, with 14,610 enrolled providers across 53 states and an average of 729 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

276 INTERNATIONAL CIRCLE
SAN JOSE, CA 95119

Provider Details

NPI 1891827788
Specialty Dermatology Physician
Credentials MD
Gender Male
NPI Issued 03/09/2007

Hospital and facility affiliations

Facilities where PETER CHAM, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

PERMANENTE MEDICAL GROUP INC
SAN JOSE, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 PETER CHAM, MD. To verify PETER CHAM, 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 · Typical

PETER CHAM, MD — brand share 20.0%
Specialty average (est.)

20% brand-name claims vs 80% generic, on 717 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.

717
Total Claims
$480K
Total Drug Cost
268
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
801
Total Day Supply
22,410
Brand vs Generic
20% brand / 80% generic
Brand Drug Cost
$450K
Generic Drug Cost
$31K
Antibiotic Claims
38

Patient Demographics

Average Patient Age
76.5 years
Avg HCC Risk Score
1.33
Gender Split
39% female / 61% male
Age Distribution
<65: 11, 65-74: 94, 75-84: 116, 85+: 47

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Fluorouracil
81
Tacrolimus
51
Triamcinolone Acetonide
51
Hydrocortisone
44
Fluocinonide
42
Betamethasone Diprop Augmented
Betamethasone/Propylene Glyc
37
Doxycycline Monohydrate
30
Acitretin
27
Cosentyx Sensoready (2 Pens)
Secukinumab
25
Amjevita(Cf) Autoinjector
Adalimumab-Atto
24

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

Dermatology Physician Overview

How PETER CHAM, MD fits within the Dermatology Physician landscape nationally.

14,610
Dermatology Physician Providers in US
53
States with Dermatology Physician
729
Avg Claims per Provider

PETER CHAM, MD's 717 claims are below the specialty average of 729.

Nearby Dermatology Physician Providers in California

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

Compare Dermatology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is PETER CHAM, MD's specialty?
PETER CHAM, MD specializes in Dermatology Physician and practices in SAN JOSE, California. Credentials: MD.
How much does PETER CHAM, MD prescribe under Medicare Part D?
In 2023, PETER CHAM, MD wrote 717 Medicare Part D claims totaling $480K in drug costs for 268 beneficiaries.
Where is PETER CHAM, MD located?
PETER CHAM, MD is located at 276 INTERNATIONAL CIRCLE, SAN JOSE, CA, 95119. Phone: (408) 972-3590.
What is PETER CHAM, MD's NPI number?
PETER CHAM, MD's National Provider Identifier (NPI) is 1891827788, issued on 03/09/2007.
Does PETER CHAM, MD prescribe more brand-name or generic drugs?
PETER CHAM, MD's prescribing is 20% brand-name and 80% generic drugs by claim count, with $450K in brand drug costs.
How many Dermatology Physician providers are there in the US?
There are 14,610 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 729 Medicare Part D claims per year.
What drugs does PETER CHAM, MD prescribe most often?
Based on 2023 Medicare Part D data, PETER CHAM, MD's most frequently prescribed drugs include Fluorouracil, Tacrolimus, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does PETER CHAM, MD accept Medicare?
PETER CHAM, MD appears in CMS Medicare data with 717 Part D claims and 268 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify PETER CHAM, MD's credentials?
PETER CHAM, MD's NPI is 1891827788 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

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