Aaron Grossberg, MD, PHD
NPI 1164775334 · Radiation Oncology Physician · Portland, OR
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aaron Grossberg, MD, PHD is a Radiation Oncology Physician provider in Portland, OR (NPI 1164775334).
Provider details
- NPI number
- 1164775334
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- PG162936 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 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
99 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) |
|---|---|---|
| Calculation of Radiation Therapy Dose77300 | 46 | $34 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 16 | $64 |
| Complex Radiation Therapy Planning77263 | 14 | $175 |
| Design and Construction of Radiation Treatment Device for High Precision Radiation Therapy77338 | 12 | $236 |
| High Precision Radiation Therapy Planning77301 | 11 | $440 |
Typical Medicare-allowed amounts for these services range $34–$440 (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)
- 1515 Holcombe BlvdUnit 097Houston, TX 77030-4000Phone: (713) 563-8488
Registry dates
- Enumerated
- 2012-10-24
- Last updated
- 2022-01-28
- Certified
- 2022-01-28
Frequently asked questions
- What is Aaron Grossberg's NPI number?
- Aaron Grossberg's National Provider Identifier (NPI) is 1164775334, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aaron Grossberg's specialty?
- Aaron Grossberg is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Grossberg located?
- Aaron Grossberg's practice location on file with NPPES is 3181 Sw Sam Jackson Park Rd # L337, Portland, OR 97239.
- What is Aaron Grossberg's phone number?
- The practice phone number listed in the NPPES registry for Aaron Grossberg is (503) 494-8756.
- Does Aaron Grossberg accept Medicare?
- Aaron Grossberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aaron Grossberg's NPI active?
- Yes — Aaron Grossberg's NPI (1164775334) is active in the NPPES registry as of the last update on 2022-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.