2026 NPPES data Hospitalist Physician NPI 1528333671 M.D.
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Nadia Sirdar, M.D.

Hospitalist Physician in Washington, District of Columbia. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,825 in Hospitalist 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
275
Medicare Part D claims · 88 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Nadia Sirdar, M.D. filed 275 Medicare Part D claims in 2023 as a Hospitalist Physician in Washington, District of Columbia, prescribing 95% generic.

275
Part D claims, 2023
95%
generic prescribing

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.

Nadia Sirdar, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

275 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 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-eligible specialty (heuristic, not verified)

Nadia Sirdar, 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).

What does the federal data show about Nadia Sirdar, M.D.?

Quality data not reported

NPI registry status

Active

Issued 03/21/2012

NPI 1528333671

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

275 69% vs specialty avg

2023 prescription claims

Specialty avg: 888

Specialty distribution in District of Columbia

How Hospitalist Physician compares to other specialties among District of Columbia providers

District of Columbia providers

Largest specialties in District of Columbia (% of in-state providers)

Home Health Aide - 20.8%Home Health Aide20.8%Personal Care Attendant - 11.5%Personal Care Attendant11.5%Case Manager/Care Coordinator - 7%Case Manager/Care Coordinator7%Student in an Organized Health Care Education/Training Program - 6.4%Student in an Organized Health Care Education/Training Program6.4%Clinical Social Worker - 4%Clinical Social Worker4%Internal Medicine Physician - 2.1%Internal Medicine Physician2.1%Hospitalist Physician - 0.1%Hospitalist Physician0.1%
Largest specialties in District of Columbia (% of in-state providers)

Specialty board-certification context

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

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

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

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

Nadia Sirdar, M.D. appears in the CMS NPPES registry as a Hospitalist Physician provider holding M.D. credentials at 5255 LOUGHBORO RD NW, Washington, DC, 20016, with a listed phone of (202) 537-4342. NPI 1528333671 was issued on 03/21/2012. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Sirdar 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 275 prescription claims written by this provider, covering 88 Medicare beneficiaries and totaling roughly $16K in drug spend, split 5% brand-name and 95% generic by claim count, with an opioid prescribing rate of 4.7%. 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.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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

5255 LOUGHBORO RD NW
Washington, DC 20016

Provider Details

NPI 1528333671
Specialty Hospitalist Physician
Credentials M.D.
Gender Female
NPI Issued 03/21/2012

Brand vs generic prescribing mix · Generic-heavy

Nadia Sirdar, M.D. - brand share 5.0%
Hospitalist Physician average

5% brand-name claims vs 95% generic, on 275 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.

275
Total Claims
$16K
Total Drug Cost
88
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
467
Total Day Supply
12,161
Brand vs Generic
5% brand / 95% generic
Brand Drug Cost
$8K
Generic Drug Cost
$8K
Opioid Claims
13 (4.7% rate)
Antibiotic Claims
30

Patient Demographics

Average Patient Age
77.0 years
Avg HCC Risk Score
2.57
Gender Split
56% female / 44% male

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
17
Carvedilol
12

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

Hospitalist Physician Overview

How Nadia Sirdar, M.D. fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

Nadia Sirdar, M.D.'s 275 claims are below the specialty average of 888.

Nearby Hospitalist Physician Providers in District of Columbia

Other clinicians with the same primary specialty enrolled in District of Columbia, drawn from the same CMS NPPES roster as Sirdar.

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

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 District of Columbia medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Hospitalist 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.

Frequently Asked Questions

What is Nadia Sirdar, M.D.'s specialty?
Nadia Sirdar, M.D. specializes in Hospitalist Physician and practices in Washington, District of Columbia. Credentials: M.D..
How much does Nadia Sirdar, M.D. prescribe under Medicare Part D?
In 2023, Nadia Sirdar, M.D. wrote 275 Medicare Part D claims totaling $16K in drug costs for 88 beneficiaries.
Where is Nadia Sirdar, M.D. located?
Nadia Sirdar, M.D. is located at 5255 LOUGHBORO RD NW, Washington, DC, 20016. Phone: (202) 537-4342.
What is Nadia Sirdar, M.D.'s NPI number?
Nadia Sirdar, M.D.'s National Provider Identifier (NPI) is 1528333671, issued on 03/21/2012.
Does Nadia Sirdar, M.D. prescribe more brand-name or generic drugs?
Nadia Sirdar, M.D.'s prescribing is 5% brand-name and 95% generic drugs by claim count, with $8K in brand drug costs.
Does Nadia Sirdar, M.D. prescribe opioids?
Yes, Nadia Sirdar, M.D. had 13 opioid claims in 2023 with an opioid prescribing rate of 4.7%.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does Nadia Sirdar, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Nadia Sirdar, M.D.'s most frequently prescribed drugs include Furosemide, Carvedilol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nadia Sirdar, M.D. accept Medicare?
Nadia Sirdar, M.D. appears in CMS Medicare data with 275 Part D claims and 88 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nadia Sirdar, M.D.'s credentials?
Nadia Sirdar, M.D.'s NPI is 1528333671 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

Compiled from official public sources by the PlainDoctor editorial team.