NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1407121684 M.D.
Verify on CMS → Heather Greenberg, M.D.
Endocrinology, Diabetes & Metabolism Physician in Morristown, New Jersey.
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
4K
Medicare Part D claims · 514 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
49%
generic claims · 44% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$231.72
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Heather Greenberg, M.D. filed 3,539 Medicare Part D claims in 2023 as an Endocrinology, Diabetes & Metabolism Physician in Morristown, New Jersey, prescribing 49% generic.
- 4K
- Part D claims, 2023
- 49%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥90th
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1407121684 · Endocrinology, Diabetes & Metabolism Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1407121684
- ENUM-MID 2012
- TAX-MID 8K Endocrinology, Diabetes
- RX-MID 3,539
- BOOK-THIN 324 in New Jersey
- PHOTO-ENUM Viviana Ortiz Santiago · 2012
Heather Greenberg, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,539 ≥ 90th percentile 90% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Heather Greenberg, M.D. 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 Heather Greenberg, M.D.?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
3,539 34% vs specialty avg
Specialty distribution in New Jersey
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among New Jersey 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).
Practice Address
Provider Details
| NPI | 1407121684 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 03/20/2012 |
Hospital and facility affiliations
Facilities where Heather Greenberg, M.D. 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.
Summit Medical Group PA
Berkeley Heights, NJ
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 Heather Greenberg, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$232
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.
Brand vs generic prescribing mix · Above average
Heather Greenberg, M.D. - brand share 44.0%
Endocrinology, Diabetes & Metabolism Physician average
44% brand-name claims vs 49% generic, on 3,539 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.
3,539
Total Claims
$1.8M
Total Drug Cost
514
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 9,461
- Total Day Supply
- 282,088
- Brand vs Generic
- 44% brand / 49% generic
- Brand Drug Cost
- $1.7M
- Generic Drug Cost
- $47K
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 1.30
- Gender Split
- 67% female / 33% male
- Age Distribution
- <65: 49, 65-74: 264, 75-84: 167, 85+: 34
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Heather Greenberg, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
593 claims
- Metformin Hcl Er
Metformin Hcl Er
268 claims
- Metformin Hcl
Metformin Hcl
252 claims
- Ozempic 194
Ozempic
194 claims
- Synthroid 180
Synthroid
180 claims
- Glipizide 134
Glipizide
134 claims
- Trulicity 125
Trulicity
125 claims
- Atorvastatin Calcium 82
Atorvastatin Calcium
82 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 593 |
| Metformin Hcl Er Metformin Hcl | 268 |
| Metformin Hcl | 252 |
| Ozempic Semaglutide | 194 |
| Synthroid Levothyroxine Sodium | 180 |
| Glipizide | 134 |
| Trulicity Dulaglutide | 125 |
| Atorvastatin Calcium | 82 |
| Humalog Kwikpen U-100 Insulin Lispro | 67 |
| Januvia Sitagliptin Phosphate | 64 |
* 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 NJ →
All providers in New Jersey →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Heather Greenberg, M.D. 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
Heather Greenberg, M.D.'s 3,539 claims are above the specialty average of 2,639.
Nationwide Endocrinology, Diabetes & Metabolism Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Greenberg, both outside New Jersey so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2012)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in New Jersey
Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as Greenberg.
One of 324 Endocrinology, Diabetes & Metabolism Physician providers enrolled in New Jersey, 5 are shown here.
Dr. Alice Abraham
M.D.
Englewood, NJ
Dr. Sonoo Advani
M.D.
West Orange, NJ
Dr. Karen Agersborg
DO
Cape May Court House, NJ
Dr. Richard Agrin
MD
New Brunswick, NJ
Dr. Sana Ahsun
MD
Piscataway, NJ
Compare Endocrinology, Diabetes & Metabolism Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Heather Greenberg, M.D.'s specialty? ▼
Heather Greenberg, M.D. specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Morristown, New Jersey. Credentials: M.D..
How much does Heather Greenberg, M.D. prescribe under Medicare Part D? ▼
In 2023, Heather Greenberg, M.D. wrote 3,539 Medicare Part D claims totaling $1.8M in drug costs for 514 beneficiaries.
Where is Heather Greenberg, M.D. located? ▼
Heather Greenberg, M.D. is located at 95 MADISON AVE, Morristown, NJ, 07960. Phone: (973) 775-5115.
What is Heather Greenberg, M.D.'s NPI number? ▼
Heather Greenberg, M.D.'s National Provider Identifier (NPI) is 1407121684, issued on 03/20/2012.
Does Heather Greenberg, M.D. prescribe more brand-name or generic drugs? ▼
Heather Greenberg, M.D.'s prescribing is 44% brand-name and 49% generic drugs by claim count, with $1.7M in brand drug costs.
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 Heather Greenberg, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Heather Greenberg, M.D.'s most frequently prescribed drugs include Levothyroxine Sodium, Metformin Hcl Er, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Heather Greenberg, M.D. accept Medicare? ▼
Heather Greenberg, M.D. appears in CMS Medicare data with 3,539 Part D claims and 514 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Heather Greenberg, M.D.'s credentials? ▼
Heather Greenberg, M.D.'s NPI is 1407121684 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
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
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.