What is Donald Block's NPI number?

Donald Block's National Provider Identifier (NPI) is 1205933934, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Donald Block's specialty?

Donald Block is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).

Where is Donald Block located?

Donald Block's practice location on file with NPPES is 2905 Telegraph Ave, Berkeley, CA 94705-2063.

What is Donald Block's phone number?

The practice phone number listed in the NPPES registry for Donald Block is (510) 841-0411.

Does Donald Block accept Medicare?

Donald Block is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Donald Block's NPI active?

Yes — Donald Block's NPI (1205933934) is active in the NPPES registry as of the last update on 2007-07-09.

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Donald Block, MD

NPI 1205933934 · Nephrology Physician · Berkeley, CA

Donald Block, MD is a Nephrology Physician provider in Berkeley, CA (NPI 1205933934).

Provider details

NPI number: 1205933934
Entity type: Individual
Primary specialty: Nephrology PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: G34174 (CA)

Practice location

2905 Telegraph Ave

Berkeley, CA 94705-2063

Phone: (510) 841-0411

Fax: (510) 845-5030

Street-level locationGet directions

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Mailing address

2905 Telegraph Ave

Berkeley, CA 94705-2063

Specialties & taxonomies

Nephrology PhysicianPrimary207RN0300XLicense G34174 (CA)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)

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: 2006-09-16
Last updated: 2007-07-09

Frequently asked questions

What is Donald Block's NPI number?: Donald Block's National Provider Identifier (NPI) is 1205933934, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Donald Block's specialty?: Donald Block is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
Where is Donald Block located?: Donald Block's practice location on file with NPPES is 2905 Telegraph Ave, Berkeley, CA 94705-2063.
What is Donald Block's phone number?: The practice phone number listed in the NPPES registry for Donald Block is (510) 841-0411.
Does Donald Block accept Medicare?: Donald Block is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Donald Block's NPI active?: Yes — Donald Block's NPI (1205933934) is active in the NPPES registry as of the last update on 2007-07-09.

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