What is Irwin Rosenberg's NPI number?

Irwin Rosenberg's National Provider Identifier (NPI) is 1336250273, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Irwin Rosenberg's specialty?

Irwin Rosenberg is listed in the NPPES registry with a primary specialty of Nutritionist (Dietary & Nutritional Service Providers).

Where is Irwin Rosenberg located?

Irwin Rosenberg's practice location on file with NPPES is 750 Washington St, Boston, MA 02111-1526.

What is Irwin Rosenberg's phone number?

The practice phone number listed in the NPPES registry for Irwin Rosenberg is (617) 636-5000.

Is Irwin Rosenberg's NPI active?

Yes — Irwin Rosenberg's NPI (1336250273) is active in the NPPES registry as of the last update on 2007-07-08.

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Irwin Rosenberg, MD

NPI 1336250273 · Nutritionist · Boston, MA

Irwin Rosenberg, MD is a Nutritionist provider in Boston, MA (NPI 1336250273).

Provider details

NPI number: 1336250273
Entity type: Individual
Primary specialty: NutritionistDietary & Nutritional Service Providers
Credential: MD
Sex: Male
Sole proprietor: No
License: 57678 (MA)

Practice location

750 Washington St

Boston, MA 02111-1526

Phone: (617) 636-5000

Street-level locationGet directions

More MA providers

Mailing address

750 Washington St

Boston, MA 02111-1526

Specialties & taxonomies

NutritionistPrimary133N00000XLicense 57678 (MA)
Dietary & Nutritional Service Providers

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.

Enumerated: 2006-08-31
Last updated: 2007-07-08

Frequently asked questions

What is Irwin Rosenberg's NPI number?: Irwin Rosenberg's National Provider Identifier (NPI) is 1336250273, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Irwin Rosenberg's specialty?: Irwin Rosenberg is listed in the NPPES registry with a primary specialty of Nutritionist (Dietary & Nutritional Service Providers).
Where is Irwin Rosenberg located?: Irwin Rosenberg's practice location on file with NPPES is 750 Washington St, Boston, MA 02111-1526.
What is Irwin Rosenberg's phone number?: The practice phone number listed in the NPPES registry for Irwin Rosenberg is (617) 636-5000.
Is Irwin Rosenberg's NPI active?: Yes — Irwin Rosenberg's NPI (1336250273) is active in the NPPES registry as of the last update on 2007-07-08.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions