2026 NPPES data Clinical & Laboratory Dermatological Immunology Physician NPI 1841408432 M.D.
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MARY CHUBA, M.D.

Clinical & Laboratory Dermatological Immunology Physician in LOS GATOS, 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
768
Medicare Part D claims · 276 beneficiaries · Clinical & Laboratory Dermatological Immunology Physician avg: 755
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$136.29
4 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

MARY CHUBA, M.D. filed 768 Medicare Part D claims in 2023 as a Clinical & Laboratory Dermatological Immunology Physician in LOS GATOS, California, prescribing 88% generic.

768
Part D claims, 2023
88%
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.

MARY CHUBA, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

768 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)

MARY CHUBA, M.D. 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 MARY CHUBA, M.D.?

Quality data not reported

NPI registry status

Active

Issued 05/18/2007

NPI 1841408432

Primary specialty

Clinical & Laboratory Dermatological Immunology Physician

Rare

63 US NPIs in this specialty

Medicare Part D claims

768 2% vs specialty avg

2023 prescription claims

Specialty avg: 755

Specialty distribution in California

How Clinical & Laboratory Dermatological Immunology Physician compares to other specialties among California providers

California providers

Clinical & Laboratory Dermatological Immunology Physician share within California

1. Clinical & Laboratory Dermatological Immunology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Clinical & Laboratory Dermatological Immunology Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Clinical & Laboratory Dermatological Immunology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Clinical & Laboratory Dermatological Immunology Physician ABMS/AOA estimate

Est. board-certified rate (Clinical & Laboratory Dermatological Immunology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Clinical & Laboratory Dermatological Immunology 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).

MARY CHUBA, M.D. appears in the CMS NPPES registry as a Clinical & Laboratory Dermatological Immunology Physician provider holding M.D. credentials at 15720 WINCHESTER BLVD, LOS GATOS, CA, 95030, with a listed phone of (408) 730-6130. NPI 1841408432 was issued on 05/18/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHUBA 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 768 prescription claims written by this provider, covering 276 Medicare beneficiaries and totaling roughly $347K in drug spend, split 12% brand-name and 88% 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.

Clinical & Laboratory Dermatological Immunology Physician is a narrow specialty nationwide, with 63 enrolled providers across 29 states and an average of 755 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

15720 WINCHESTER BLVD
LOS GATOS, CA 95030

Provider Details

NPI 1841408432
Specialty Clinical & Laboratory Dermatological Immunology Physician
Credentials M.D.
Gender Female
NPI Issued 05/18/2007

Hospital and facility affiliations

Facilities where MARY CHUBA, M.D. 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.

SUTTER BAY MEDICAL FOUNDATION
SOQUEL, 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).

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 MARY CHUBA, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$136

Largest payer

PFIZER INC.

Most common payment type

Food and Beverage

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 MARY CHUBA, M.D.. To verify MARY CHUBA, M.D.'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

MARY CHUBA, M.D. — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 768 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.

768
Total Claims
$347K
Total Drug Cost
276
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,014
Total Day Supply
27,281
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$316K
Generic Drug Cost
$31K
Antibiotic Claims
36

Patient Demographics

Average Patient Age
74.2 years
Avg HCC Risk Score
0.80
Gender Split
63% female / 37% male

Top Prescribed Drugs (Medicare Part D)

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

What MARY CHUBA, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Ketoconazole
113
Finasteride
53
Hydrocortisone
44
Fluocinonide
43
Mometasone Furoate
39
Fluorouracil
36
Metronidazole
36
Triamcinolone Acetonide
34
Clobetasol Propionate
32
Betamethasone Diprop Augmented
Betamethasone/Propylene Glyc
29

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

Clinical & Laboratory Dermatological Immunology Physician Overview

How MARY CHUBA, M.D. fits within the Clinical & Laboratory Dermatological Immunology Physician landscape nationally.

63
Clinical & Laboratory Dermatological Immunology Physician Providers in US
29
States with Clinical & Laboratory Dermatological Immunology Physician
755
Avg Claims per Provider

MARY CHUBA, M.D.'s 768 claims are above the specialty average of 755.

Nearby Clinical & Laboratory Dermatological Immunology Physician Providers in California

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

Compare Clinical & Laboratory Dermatological Immunology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARY CHUBA, M.D.'s specialty?
MARY CHUBA, M.D. specializes in Clinical & Laboratory Dermatological Immunology Physician and practices in LOS GATOS, California. Credentials: M.D..
How much does MARY CHUBA, M.D. prescribe under Medicare Part D?
In 2023, MARY CHUBA, M.D. wrote 768 Medicare Part D claims totaling $347K in drug costs for 276 beneficiaries.
Where is MARY CHUBA, M.D. located?
MARY CHUBA, M.D. is located at 15720 WINCHESTER BLVD, LOS GATOS, CA, 95030. Phone: (408) 730-6130.
What is MARY CHUBA, M.D.'s NPI number?
MARY CHUBA, M.D.'s National Provider Identifier (NPI) is 1841408432, issued on 05/18/2007.
Does MARY CHUBA, M.D. prescribe more brand-name or generic drugs?
MARY CHUBA, M.D.'s prescribing is 12% brand-name and 88% generic drugs by claim count, with $316K in brand drug costs.
How many Clinical & Laboratory Dermatological Immunology Physician providers are there in the US?
There are 63 Clinical & Laboratory Dermatological Immunology Physician providers across 29 states in the US. The average Clinical & Laboratory Dermatological Immunology Physician provider writes 755 Medicare Part D claims per year.
What drugs does MARY CHUBA, M.D. prescribe most often?
Based on 2023 Medicare Part D data, MARY CHUBA, M.D.'s most frequently prescribed drugs include Ketoconazole, Finasteride, Hydrocortisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARY CHUBA, M.D. accept Medicare?
MARY CHUBA, M.D. appears in CMS Medicare data with 768 Part D claims and 276 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARY CHUBA, M.D.'s credentials?
MARY CHUBA, M.D.'s NPI is 1841408432 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