NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1508205535 MD
Verify on CMS → Ahmer Ishtiaq, MD
Hospitalist Physician in Worcester, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,938 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
392
Medicare Part D claims · 140 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Ahmer Ishtiaq, MD filed 392 Medicare Part D claims in 2023 as a Hospitalist Physician in Worcester, Massachusetts, prescribing 86% generic.
- 392
- Part D claims, 2023
- 86%
- 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.
Ahmer Ishtiaq, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
392 Top 43% higher than 57% of 1,370,886 prescribers
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)
Ahmer Ishtiaq, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Ahmer Ishtiaq, MD?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
392 56% vs specialty avg
Specialty distribution in Massachusetts
How Hospitalist Physician compares to other specialties among Massachusetts providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Hospitalist Physician. Verify directly:
How MIPS and board certification work
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).
Ahmer Ishtiaq, MD appears in the CMS NPPES registry as a Hospitalist Physician provider holding MD credentials at 123 SUMMER ST, Worcester, MA, 01608, with a listed phone of (508) 363-6849. NPI 1508205535 was issued on 06/24/2013.
Medicare Part D records for calendar year 2023 show 392 prescription claims written by this provider, covering 140 Medicare beneficiaries and totaling roughly $31K in drug spend, split 14% brand-name and 86% generic by claim count.
Hospitalist Physician is a mid-sized specialty nationwide, with 16,938 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
Provider Details
| NPI | 1508205535 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/24/2013 |
Hospital and facility affiliations
Facilities where Ahmer Ishtiaq, 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.
Quantum Emergency Physicians PA
Brownwood, TX
Scott And White Clinic
College Station, TX
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 - Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Ahmer Ishtiaq, MD. To verify Ahmer Ishtiaq, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Ahmer Ishtiaq, MD - brand share 14.0%
Hospitalist Physician average
14% brand-name claims vs 86% generic, on 392 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.
392
Total Claims
$31K
Total Drug Cost
140
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 425
- Total Day Supply
- 9,075
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $23K
- Generic Drug Cost
- $8K
- Antibiotic Claims
- 78
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 2.39
- Gender Split
- 54% female / 46% male
- Age Distribution
- <65: 25, 65-74: 51, 75-84: 36, 85+: 28
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ahmer Ishtiaq, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
44 claims
- Losartan Potassium
Losartan Potassium
20 claims
- Eliquis
Eliquis
19 claims
- Amlodipine Besylate
Amlodipine Besylate
18 claims
- Amoxicillin-Clavul… 14
Amoxicillin-Clavulanate Potass
14 claims
- Pantoprazole Sodium 14
Pantoprazole Sodium
14 claims
- Allopurinol 13
Allopurinol
13 claims
- Levofloxacin 13
Levofloxacin
13 claims
| Drug | Claims |
|---|---|
| Prednisone | 44 |
| Losartan Potassium | 20 |
| Eliquis Apixaban | 19 |
| Amlodipine Besylate | 18 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 14 |
| Pantoprazole Sodium | 14 |
| Allopurinol | 13 |
| Levofloxacin | 13 |
| Furosemide | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Ahmer Ishtiaq, MD fits within the Hospitalist Physician landscape nationally.
16,938
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Ahmer Ishtiaq, MD's 392 claims are below the specialty average of 888.
Nearby Hospitalist Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Ishtiaq.
Dr. Nathan Abare
MD
Springfield, MA
Dr. Omar Abduljabar
M.D.
Springfield, MA
Dr. Ramy Abu Sukheila
M.D
Fall River, MA
Dr. Deepak Acharya
MD
Springfield, MA
Dr. Lopamudra Acharya
MD
Needham, MA
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 Massachusetts 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.
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Frequently Asked Questions
What is Ahmer Ishtiaq, MD's specialty? ▼
Ahmer Ishtiaq, MD specializes in Hospitalist Physician and practices in Worcester, Massachusetts. Credentials: MD.
How much does Ahmer Ishtiaq, MD prescribe under Medicare Part D? ▼
In 2023, Ahmer Ishtiaq, MD wrote 392 Medicare Part D claims totaling $31K in drug costs for 140 beneficiaries.
Where is Ahmer Ishtiaq, MD located? ▼
Ahmer Ishtiaq, MD is located at 123 SUMMER ST, Worcester, MA, 01608. Phone: (508) 363-6849.
What is Ahmer Ishtiaq, MD's NPI number? ▼
Ahmer Ishtiaq, MD's National Provider Identifier (NPI) is 1508205535, issued on 06/24/2013.
Does Ahmer Ishtiaq, MD prescribe more brand-name or generic drugs? ▼
Ahmer Ishtiaq, MD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $23K in brand drug costs.
How many Hospitalist Physician providers are there in the US? ▼
There are 16,938 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 Ahmer Ishtiaq, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Ahmer Ishtiaq, MD's most frequently prescribed drugs include Prednisone, Losartan Potassium, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ahmer Ishtiaq, MD accept Medicare? ▼
Ahmer Ishtiaq, MD appears in CMS Medicare data with 392 Part D claims and 140 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ahmer Ishtiaq, MD's credentials? ▼
Ahmer Ishtiaq, MD's NPI is 1508205535 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
View source datasets and methodology notes
- 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.