Jon Aster, MD PHD
NPI 1023075702 · Anatomic Pathology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jon Aster, MD PHD is a Anatomic Pathology Physician provider in Boston, MA (NPI 1023075702).
Provider details
- NPI number
- 1023075702
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 74051 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
283 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Bone Marrow, Smear Interpretation85097 | 165 | $50 |
| Surgical Pathology Consultation and Report on Referred Slides Prepared Elsewhere88321 | 51 | $86 |
| Special Stained Specimen Slides to Examine Tissue Including Interpretation and Report88313 | 43 | $12 |
| Surgical Pathology Consultation and Report, Comprehensive88325 | 24 | $138 |
Typical Medicare-allowed amounts for these services range $12–$138 (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.
Practice location
Mailing address
Additional practice locations (1)
- 55 Fruit StBoston, MA 02114-2696Phone: (617) 726-2000
Registry dates
- Enumerated
- 2006-04-27
- Last updated
- 2026-04-07
- Certified
- 2026-04-07
Frequently asked questions
- What is Jon Aster's NPI number?
- Jon Aster's National Provider Identifier (NPI) is 1023075702, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jon Aster's specialty?
- Jon Aster is listed in the NPPES registry with a primary specialty of Anatomic Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Jon Aster located?
- Jon Aster's practice location on file with NPPES is 75 Francis St, Boston, MA 02115.
- What is Jon Aster's phone number?
- The practice phone number listed in the NPPES registry for Jon Aster is (617) 732-5500.
- Does Jon Aster accept Medicare?
- Jon Aster is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jon Aster's NPI active?
- Yes — Jon Aster's NPI (1023075702) is active in the NPPES registry as of the last update on 2026-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.