Kenneth Grundfast, M.D.
NPI 1336101054 · Otolaryngology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kenneth Grundfast, M.D. is a Otolaryngology Physician provider in Boston, MA (NPI 1336101054).
Provider details
- NPI number
- 1336101054
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD6119 (DC)
Specialties & taxonomies
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
81 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 24 | $117 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 23 | $89 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 21 | $69 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 13 | $86 |
Typical Medicare-allowed amounts for these services range $69–$117 (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 (3)
- 2300 M St NwWashington, DC 20037-1434Phone: (202) 741-3574
- 243 Charles StBoston, MA 02114-3002Phone: (617) 573-5526
- 800 Huntington AveBoston, MA 02115-6303Phone: (617) 936-6160
Registry dates
- Enumerated
- 2006-04-06
- Last updated
- 2023-11-03
- Certified
- 2023-11-03
Frequently asked questions
- What is Kenneth Grundfast's NPI number?
- Kenneth Grundfast's National Provider Identifier (NPI) is 1336101054, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kenneth Grundfast's specialty?
- Kenneth Grundfast is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Kenneth Grundfast located?
- Kenneth Grundfast's practice location on file with NPPES is 820 Harrison Ave, Boston, MA 02118-2905.
- What is Kenneth Grundfast's phone number?
- The practice phone number listed in the NPPES registry for Kenneth Grundfast is (617) 638-7934.
- Does Kenneth Grundfast accept Medicare?
- Kenneth Grundfast is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kenneth Grundfast's NPI active?
- Yes — Kenneth Grundfast's NPI (1336101054) is active in the NPPES registry as of the last update on 2023-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.