2026 NPPES data Hematology & Oncology Physician NPI 1285307439
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MARYAM NASER

Hematology & Oncology Physician in RICHMOND, Virginia. 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
798
Medicare Part D claims · 80 beneficiaries · Hematology & Oncology Physician avg: 847
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

MARYAM NASER filed 798 Medicare Part D claims in 2023 as a Hematology & Oncology Physician in RICHMOND, Virginia, prescribing 76% generic.

798
Part D claims, 2023
76%
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.

MARYAM NASER's Medicare Part D volume vs every U.S. prescriber

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

798 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-eligible specialty (heuristic — not verified)

MARYAM NASER 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 MARYAM NASER?

Quality data not reported

NPI registry status

Active

Issued 07/25/2021

NPI 1285307439

Primary specialty

Hematology & Oncology Physician

Mid-sized

11,215 US NPIs in this specialty

Medicare Part D claims

798 6% vs specialty avg

2023 prescription claims

Specialty avg: 847

Specialty distribution in Virginia

How Hematology & Oncology Physician compares to other specialties among Virginia providers

Virginia providers

Hematology & Oncology Physician share within Virginia

1. Hematology & Oncology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hematology & Oncology Physician share within Virginia

Specialty board-certification context

Estimated specialty board-certified rate — Hematology & Oncology Physician (ABMS / AOA reference)

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

Est. board-certified rate (Hematology & Oncology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Hematology & Oncology 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).

MARYAM NASER appears in the CMS NPPES registry as a Hematology & Oncology Physician provider at 1001 E LEIGH ST FL 4, RICHMOND, VA, 23298, with a listed phone of (804) 828-7999. NPI 1285307439 was issued on 07/25/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what NASER 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 798 prescription claims written by this provider, covering 80 Medicare beneficiaries and totaling roughly $116K in drug spend, split 24% brand-name and 76% generic by claim count, with an opioid prescribing rate of 2.0%. 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.

Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,215 enrolled providers across 54 states and an average of 847 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

1001 E LEIGH ST FL 4
RICHMOND, VA 23298

Provider Details

NPI 1285307439
Specialty Hematology & Oncology Physician
Gender Female
NPI Issued 07/25/2021

Brand vs generic prescribing mix · Typical

MARYAM NASER — brand share 24.0%
Specialty average (est.)

24% brand-name claims vs 76% generic, on 798 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.

798
Total Claims
$116K
Total Drug Cost
80
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,062
Total Day Supply
29,713
Brand vs Generic
24% brand / 76% generic
Brand Drug Cost
$101K
Generic Drug Cost
$14K
Opioid Claims
16 (2.0% rate)
Antibiotic Claims
19

Patient Demographics

Average Patient Age
61.6 years
Avg HCC Risk Score
1.35
Gender Split
50% female / 50% male
Age Distribution
<65: 36, 65-74: 34, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What MARYAM NASER 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
Atorvastatin Calcium
58
Trulicity
Dulaglutide
56
Amlodipine Besylate
44
Fluticasone Propionate
43
Omeprazole
43
Metformin Hcl
30
Diclofenac Sodium
29
Gabapentin
28
Tamsulosin Hcl
28
Lisinopril
25

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

Hematology & Oncology Physician Overview

How MARYAM NASER fits within the Hematology & Oncology Physician landscape nationally.

11,215
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider

MARYAM NASER's 798 claims are below the specialty average of 847.

Nearby Hematology & Oncology Physician Providers in Virginia

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

Compare Hematology & Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARYAM NASER's specialty?
MARYAM NASER specializes in Hematology & Oncology Physician and practices in RICHMOND, Virginia.
How much does MARYAM NASER prescribe under Medicare Part D?
In 2023, MARYAM NASER wrote 798 Medicare Part D claims totaling $116K in drug costs for 80 beneficiaries.
Where is MARYAM NASER located?
MARYAM NASER is located at 1001 E LEIGH ST FL 4, RICHMOND, VA, 23298. Phone: (804) 828-7999.
What is MARYAM NASER's NPI number?
MARYAM NASER's National Provider Identifier (NPI) is 1285307439, issued on 07/25/2021.
Does MARYAM NASER prescribe more brand-name or generic drugs?
MARYAM NASER's prescribing is 24% brand-name and 76% generic drugs by claim count, with $101K in brand drug costs.
Does MARYAM NASER prescribe opioids?
Yes, MARYAM NASER had 16 opioid claims in 2023 with an opioid prescribing rate of 2.0%.
How many Hematology & Oncology Physician providers are there in the US?
There are 11,215 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
What drugs does MARYAM NASER prescribe most often?
Based on 2023 Medicare Part D data, MARYAM NASER's most frequently prescribed drugs include Atorvastatin Calcium, Trulicity, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARYAM NASER accept Medicare?
MARYAM NASER appears in CMS Medicare data with 798 Part D claims and 80 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARYAM NASER's credentials?
MARYAM NASER's NPI is 1285307439. 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