2026 NPPES data Sleep Medicine (Internal Medicine) Physician NPI 1558665562 D.O.
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PUJA THAKKAR, D.O.

Sleep Medicine (Internal Medicine) Physician in DANVILLE, 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
118
Medicare Part D claims · 34 beneficiaries · Sleep Medicine (Internal Medicine) Physician avg: 1K
Industry payments
$449.32
12 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

PUJA THAKKAR, D.O. filed 118 Medicare Part D claims in 2023 as a Sleep Medicine (Internal Medicine) Physician in DANVILLE, California.

118
Part D claims, 2023
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.

PUJA THAKKAR, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

118 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 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)

PUJA THAKKAR, D.O. 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 PUJA THAKKAR, D.O.?

Quality data not reported

NPI registry status

Active

Issued 01/05/2011

NPI 1558665562

Primary specialty

Sleep Medicine (Internal Medicine) Physician

Niche

857 US NPIs in this specialty

Medicare Part D claims

118 91% vs specialty avg

2023 prescription claims

Specialty avg: 1,310

Specialty distribution in California

How Sleep Medicine (Internal Medicine) Physician compares to other specialties among California providers

California providers

Sleep Medicine (Internal Medicine) Physician share within California

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

Specialty board-certification context

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

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

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

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

PUJA THAKKAR, D.O. appears in the CMS NPPES registry as a Sleep Medicine (Internal Medicine) Physician provider holding D.O. credentials at 400 EL CERRO BLVD #107, DANVILLE, CA, 94526, with a listed phone of (925) 820-4472. NPI 1558665562 was issued on 01/05/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what THAKKAR 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 118 prescription claims written by this provider, covering 34 Medicare beneficiaries and totaling roughly $2K in drug spend. 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.

Sleep Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 857 enrolled providers across 52 states and an average of 1,310 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

400 EL CERRO BLVD #107
DANVILLE, CA 94526

Provider Details

NPI 1558665562
Specialty Sleep Medicine (Internal Medicine) Physician
Credentials D.O.
Gender Female
NPI Issued 01/05/2011

Hospital and facility affiliations

Facilities where PUJA THAKKAR, D.O. 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.

PUJA THAKKAR DO MEDICAL CORPORATION
FREMONT, 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 PUJA THAKKAR, D.O.. Source: openpaymentsdata.cms.gov.

Total received

$449

Largest payer

Inspire Medical Systems, 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 PUJA THAKKAR, D.O.. To verify PUJA THAKKAR, D.O.'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.

Medicare Part D Prescribing Data

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

118
Total Claims
$2K
Total Drug Cost
34
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
153
Total Day Supply
4,115
Generic Drug Cost
$1K

Patient Demographics

Average Patient Age
72.6 years
Avg HCC Risk Score
0.83
Gender Split
62% female / 38% male

Top Prescribed Drugs (Medicare Part D)

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

What PUJA THAKKAR, D.O. 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
Clonazepam
33
Gabapentin
32
Zolpidem Tartrate
18
Quetiapine Fumarate
15

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

Sleep Medicine (Internal Medicine) Physician Overview

How PUJA THAKKAR, D.O. fits within the Sleep Medicine (Internal Medicine) Physician landscape nationally.

857
Sleep Medicine (Internal Medicine) Physician Providers in US
52
States with Sleep Medicine (Internal Medicine) Physician
1,310
Avg Claims per Provider

PUJA THAKKAR, D.O.'s 118 claims are below the specialty average of 1,310.

Nearby Sleep Medicine (Internal Medicine) Physician Providers in California

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

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

Frequently Asked Questions

What is PUJA THAKKAR, D.O.'s specialty?
PUJA THAKKAR, D.O. specializes in Sleep Medicine (Internal Medicine) Physician and practices in DANVILLE, California. Credentials: D.O..
How much does PUJA THAKKAR, D.O. prescribe under Medicare Part D?
In 2023, PUJA THAKKAR, D.O. wrote 118 Medicare Part D claims totaling $2K in drug costs for 34 beneficiaries.
Where is PUJA THAKKAR, D.O. located?
PUJA THAKKAR, D.O. is located at 400 EL CERRO BLVD #107, DANVILLE, CA, 94526. Phone: (925) 820-4472.
What is PUJA THAKKAR, D.O.'s NPI number?
PUJA THAKKAR, D.O.'s National Provider Identifier (NPI) is 1558665562, issued on 01/05/2011.
How many Sleep Medicine (Internal Medicine) Physician providers are there in the US?
There are 857 Sleep Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Sleep Medicine (Internal Medicine) Physician provider writes 1,310 Medicare Part D claims per year.
What drugs does PUJA THAKKAR, D.O. prescribe most often?
Based on 2023 Medicare Part D data, PUJA THAKKAR, D.O.'s most frequently prescribed drugs include Clonazepam, Gabapentin, Zolpidem Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does PUJA THAKKAR, D.O. accept Medicare?
PUJA THAKKAR, D.O. appears in CMS Medicare data with 118 Part D claims and 34 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify PUJA THAKKAR, D.O.'s credentials?
PUJA THAKKAR, D.O.'s NPI is 1558665562 with credentials D.O.. 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