IndividualActive
Richard Grentzenberg, M.D.
NPI 1538122536 · Otolaryngology Physician · Boston, MA
Richard Grentzenberg, M.D. is a Otolaryngology Physician provider in Boston, MA (NPI 1538122536).
Provider details
- NPI number
- 1538122536
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 30440 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
830 Harrison Avenue
Suite 1400
Boston, MA 02118
Phone: (617) 638-8124
Fax: (617) 638-6424
Street-level locationGet directions
Mailing address
720 Harrison Ave
Boston, MA 02118-2371
Registry dates
- Enumerated
- 2006-04-10
- Last updated
- 2014-04-16
Frequently asked questions
- What is Richard Grentzenberg's NPI number?
- Richard Grentzenberg's National Provider Identifier (NPI) is 1538122536, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Richard Grentzenberg's specialty?
- Richard Grentzenberg is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Richard Grentzenberg located?
- Richard Grentzenberg's practice location on file with NPPES is 830 Harrison Avenue, Boston, MA 02118.
- What is Richard Grentzenberg's phone number?
- The practice phone number listed in the NPPES registry for Richard Grentzenberg is (617) 638-8124.
- Is Richard Grentzenberg's NPI active?
- Yes — Richard Grentzenberg's NPI (1538122536) is active in the NPPES registry as of the last update on 2014-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.