Zachary Frosch, M.D.
NPI 1992118368 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Frosch, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1992118368).
Provider details
- NPI number
- 1992118368
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 259094 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
337 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 146 | $99 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 104 | $17 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 70 | $146 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 17 | $129 |
Typical Medicare-allowed amounts for these services range $17–$146 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acyclovir | 33 | 18 |
| Ibrutinibbrand: Imbruvica | 26 | — |
| Zanubrutinibbrand: Brukinsa | 22 | — |
| Venetoclaxbrand: Venclexta | 21 | — |
| Prednisone | 19 | — |
| Atovaquone | 16 | — |
| Pirtobrutinibbrand: Jaypirca | 16 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$241 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-06-03
- Last updated
- 2014-06-03
Frequently asked questions
- What is Zachary Frosch's NPI number?
- Zachary Frosch's National Provider Identifier (NPI) is 1992118368, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Frosch's specialty?
- Zachary Frosch is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Frosch located?
- Zachary Frosch's practice location on file with NPPES is 75 Francis St, Boston, MA 02115-6110.
- What is Zachary Frosch's phone number?
- The practice phone number listed in the NPPES registry for Zachary Frosch is (617) 732-5500.
- Does Zachary Frosch accept Medicare?
- Zachary Frosch is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Frosch's NPI active?
- Yes — Zachary Frosch's NPI (1992118368) is active in the NPPES registry as of the last update on 2014-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.