NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1598766982 MD
Verify on CMS → Glenn McGrath, MD
Endocrinology, Diabetes & Metabolism Physician in Willow Grove, Pennsylvania.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 7,871 in Endocrinology, Diabetes & Metabolism 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
7K
Medicare Part D claims · 582 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
61%
generic claims · 34% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$513.81
17 payments · CMS Open Payments (Sunshine Act)
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
Glenn McGrath, MD filed 6,567 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in Willow Grove, Pennsylvania, prescribing 61% generic.
- 7K
- Part D claims, 2023
- 61%
- 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.
Glenn McGrath, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,567 Top 4% higher than 96% 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)
Glenn McGrath, MD 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 Glenn McGrath, MD?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
6,567 149% vs specialty avg
Specialty distribution in Pennsylvania
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among Pennsylvania 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 Endocrinology, Diabetes & Metabolism 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).
Glenn McGrath, MD appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding MD credentials at 2300 COMPUTER RD, Willow Grove, PA, 19090, with a listed phone of (215) 657-5200. NPI 1598766982 was issued on 08/09/2005.
Medicare Part D records for calendar year 2023 show 6,567 prescription claims written by this provider, covering 582 Medicare beneficiaries and totaling roughly $2.1 million in drug spend, split 34% brand-name and 61% generic by claim count, with an opioid prescribing rate of 0.9%.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,871 enrolled providers across 54 states and an average of 2,639 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 | 1598766982 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/09/2005 |
Hospital and facility affiliations
Facilities where Glenn McGrath, 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.
Abington Memorial Hospital
Abington, PA
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 Glenn McGrath, MD. Source: openpaymentsdata.cms.gov.
Total received
$514
Largest payer
Amgen 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 - Pennsylvania PA-BOM 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 ~45K Pennsylvania medical licensees in 2023 - they are NOT specific to Glenn McGrath, MD. To verify Glenn McGrath, MD's current license status, search the PA-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
133
Total board actions, Pennsylvania 2023
Across 129 cases
2.96
Actions per 1,000 licensees
Pennsylvania statewide rate
probation
Most common action type
48 cases
PA-BOM 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 Pennsylvania disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Glenn McGrath, MD - brand share 34.0%
Endocrinology, Diabetes & Metabolism Physician average
34% brand-name claims vs 61% generic, on 6,567 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.
6,567
Total Claims
$2.1M
Total Drug Cost
582
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12,488
- Total Day Supply
- 369,931
- Brand vs Generic
- 34% brand / 61% generic
- Brand Drug Cost
- $2.0M
- Generic Drug Cost
- $109K
- Opioid Claims
- 60 (0.9% rate)
- Antibiotic Claims
- 67
Patient Demographics
- Average Patient Age
- 76.7 years
- Avg HCC Risk Score
- 1.60
- Gender Split
- 66% female / 34% male
- Age Distribution
- <65: 20, 65-74: 229, 75-84: 222, 85+: 111
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Glenn McGrath, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
558 claims
- Synthroid
Synthroid
331 claims
- Atorvastatin Calcium
Atorvastatin Calcium
229 claims
- Trulicity 202
Trulicity
202 claims
- Metformin Hcl Er 198
Metformin Hcl Er
198 claims
- Novolog Flexpen 185
Novolog Flexpen
185 claims
- Metformin Hcl 182
Metformin Hcl
182 claims
- Repaglinide 149
Repaglinide
149 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 558 |
| Synthroid Levothyroxine Sodium | 331 |
| Atorvastatin Calcium | 229 |
| Trulicity Dulaglutide | 202 |
| Metformin Hcl Er Metformin Hcl | 198 |
| Novolog Flexpen Insulin Aspart | 185 |
| Metformin Hcl | 182 |
| Repaglinide | 149 |
| Furosemide | 147 |
| Rosuvastatin Calcium | 112 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in PA →
All providers in Pennsylvania →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Glenn McGrath, MD fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,871
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Glenn McGrath, MD's 6,567 claims are above the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Pennsylvania
Other clinicians with the same primary specialty enrolled in Pennsylvania, drawn from the same CMS NPPES roster as McGrath.
Dr. Munira Abbasi
MD
Pittsburgh, PA
Dr. Jana Abraham
MD
Berwyn, PA
Dr. Rachel Abramczyk
DO
Parkesburg, PA
Dr. Michael Adler
M.D.
Lewisburg, PA
Shivani Agarwal
Philadelphia, PA
Compare Endocrinology, Diabetes & Metabolism 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 Pennsylvania medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Endocrinology, Diabetes & Metabolism 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Pennsylvania
Frequently Asked Questions
What is Glenn McGrath, MD's specialty? ▼
Glenn McGrath, MD specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Willow Grove, Pennsylvania. Credentials: MD.
How much does Glenn McGrath, MD prescribe under Medicare Part D? ▼
In 2023, Glenn McGrath, MD wrote 6,567 Medicare Part D claims totaling $2.1M in drug costs for 582 beneficiaries.
Where is Glenn McGrath, MD located? ▼
Glenn McGrath, MD is located at 2300 COMPUTER RD, Willow Grove, PA, 19090. Phone: (215) 657-5200.
What is Glenn McGrath, MD's NPI number? ▼
Glenn McGrath, MD's National Provider Identifier (NPI) is 1598766982, issued on 08/09/2005.
Does Glenn McGrath, MD prescribe more brand-name or generic drugs? ▼
Glenn McGrath, MD's prescribing is 34% brand-name and 61% generic drugs by claim count, with $2.0M in brand drug costs.
Does Glenn McGrath, MD prescribe opioids? ▼
Yes, Glenn McGrath, MD had 60 opioid claims in 2023 with an opioid prescribing rate of 0.9%.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,871 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Glenn McGrath, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Glenn McGrath, MD's most frequently prescribed drugs include Levothyroxine Sodium, Synthroid, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Glenn McGrath, MD accept Medicare? ▼
Glenn McGrath, MD appears in CMS Medicare data with 6,567 Part D claims and 582 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Glenn McGrath, MD's credentials? ▼
Glenn McGrath, MD's NPI is 1598766982 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.