NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1306407077 MD
Verify on CMS → Zachary Grunwald, MD
Emergency Medicine Physician in Philadelphia, 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 64,463 in Emergency Medicine 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
322
Medicare Part D claims · 217 beneficiaries · Emergency Medicine Physician avg: 352
MIPS score
98.6/100
▲ 15 pts above national avg 83.5 · Exceptional
What the federal data shows
Zachary Grunwald, MD reported a CMS MIPS final score of 98.6/100 - above the 83.5 national average - and filed 322 Medicare Part D claims in 2023.
- 98.6/100
- MIPS score · +15 vs avg
- 322
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥89th
- pct among measured MIPS (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 1306407077 · Emergency Medicine Physician
NPI-10 · ENUM-RECENT · TAX-MEGA · MIPS-ELITE · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1306407077
- ENUM-RECENT 2019
- TAX-MEGA 64K Emergency Medicine
- MIPS-ELITE 98.6/100
- RX-LIGHT 322
- BOOK-LIGHT 3,617 in Pennsylvania
- PHOTO-FINISH Ted Apstein · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Grunwald · this …
Grunwald · this provider
98.6 MIPS pts
- Stephanie Brown …
Stephanie Brown
98.6 MIPS pts
- Ted Apstein · near
Ted Apstein
98.6 MIPS pts
- Aaron Barber · n…
Aaron Barber
98.6 MIPS pts
- Ronn Berrol · near
Ronn Berrol
98.6 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Zachary Grunwald, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
99 ≥ 89th percentile 89% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Zachary Grunwald, MD sits
This provider among emergency medicine physician peers
Across the 14,017 emergency medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Zachary Grunwald, MD writes more Part D claims than 83% of them and scores higher on MIPS quality than 89% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one emergency medicine physician peer from a representative sample of 60; the gold marker is Zachary Grunwald, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Zachary Grunwald, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Zachary Grunwald, MD?
High performer (top quartile)Primary specialty
Emergency Medicine Physician
Medicare Part D claims
322 9% vs specialty avg
MIPS final score
98.6/100 15.1 pts vs avg
Specialty distribution in Pennsylvania
How Emergency Medicine Physician compares to other specialties among Pennsylvania providers
Medicare quality performance, MIPS
Zachary Grunwald, MD's 2023 MIPS final score plotted against the Emergency Medicine Physician national average
- MIPS Final Score
- 98.6/100
- vs 83.5 national avg · 2023 performance year
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 | 1306407077 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/24/2019 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
98.5683
Final Score
Measured-score avg: 83.5
81.8434
Quality
100
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where Zachary Grunwald, 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.
Berkeley Emergency Medical Group Inc
Oakland, CA
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 - 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 Zachary Grunwald, MD. To verify Zachary Grunwald, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
322
Total Claims
$9K
Total Drug Cost
217
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 322
- Total Day Supply
- 2,579
- Generic Drug Cost
- $4K
- Opioid Claims
- 31 (9.6% rate)
- Antibiotic Claims
- 112
Patient Demographics
- Average Patient Age
- 74.9 years
- Avg HCC Risk Score
- 2.05
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 24, 65-74: 80, 75-84: 61, 85+: 52
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Zachary Grunwald, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
36 claims
- Ondansetron Odt
Ondansetron Odt
32 claims
- Diclofenac Sodium
Diclofenac Sodium
26 claims
- Oxycodone Hcl
Oxycodone Hcl
26 claims
- Doxycycline Hyclate
Doxycycline Hyclate
20 claims
- Pantoprazole Sodium
Pantoprazole Sodium
18 claims
- Ibuprofen
Ibuprofen
17 claims
- Prednisone
Prednisone
15 claims
| Drug | Claims |
|---|---|
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 36 |
| Ondansetron Odt Ondansetron | 32 |
| Diclofenac Sodium | 26 |
| Oxycodone Hcl | 26 |
| Doxycycline Hyclate | 20 |
| Pantoprazole Sodium | 18 |
| Ibuprofen | 17 |
| Prednisone | 15 |
| Cefpodoxime Proxetil | 12 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How Zachary Grunwald, MD fits within the Emergency Medicine Physician landscape nationally.
64,463
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider
Zachary Grunwald, MD's 322 claims are below the specialty average of 352.
Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Grunwald, both outside Pennsylvania so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (98.6 here).
Same NPPES enumeration year (2019)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Emergency Medicine Physician Providers in Pennsylvania
Other clinicians with the same primary specialty enrolled in Pennsylvania, drawn from the same CMS NPPES roster as Grunwald.
One of 3,617 Emergency Medicine Physician providers enrolled in Pennsylvania, 5 are shown here.
Dr. Nicole Abate
MD
Phila, PA
Osman Abbasi
Bethlehem, PA
Dr. Michael Abboud
MD
Philadelphia, PA
Dr. Stephanie Abbuhl
MD
Philadelphia, PA
Dr. Rehab Abdel-Kariem
M.D.
Philadelphia, PA
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Zachary Grunwald, MD's specialty? ▼
Zachary Grunwald, MD specializes in Emergency Medicine Physician and practices in Philadelphia, Pennsylvania. Credentials: MD.
How much does Zachary Grunwald, MD prescribe under Medicare Part D? ▼
In 2023, Zachary Grunwald, MD wrote 322 Medicare Part D claims totaling $9K in drug costs for 217 beneficiaries.
What is Zachary Grunwald, MD's Medicare quality score? ▼
Zachary Grunwald, MD has a CMS MIPS Final Score of 98.6/100 (Quality: 81.8, Cost: 100). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Zachary Grunwald, MD located? ▼
Zachary Grunwald, MD is located at 3401 N BROAD ST, Philadelphia, PA, 19140. Phone: (215) 707-7550.
What is Zachary Grunwald, MD's NPI number? ▼
Zachary Grunwald, MD's National Provider Identifier (NPI) is 1306407077, issued on 06/24/2019.
Does Zachary Grunwald, MD prescribe opioids? ▼
Yes, Zachary Grunwald, MD had 31 opioid claims in 2023 with an opioid prescribing rate of 9.6%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,463 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does Zachary Grunwald, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Zachary Grunwald, MD's most frequently prescribed drugs include Amoxicillin-Clavulanate Potass, Ondansetron Odt, Diclofenac Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Zachary Grunwald, MD accept Medicare? ▼
Zachary Grunwald, MD appears in CMS Medicare data with 322 Part D claims and 217 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Zachary Grunwald, MD's credentials? ▼
Zachary Grunwald, MD's NPI is 1306407077 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.