What is Jon Greif's NPI number?

Jon Greif's National Provider Identifier (NPI) is 1306958095, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Jon Greif's specialty?

Jon Greif is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).

Where is Jon Greif located?

Jon Greif's practice location on file with NPPES is 3300 Webster St, Oakland, CA 94609-3117.

What is Jon Greif's phone number?

The practice phone number listed in the NPPES registry for Jon Greif is (510) 835-9900.

Is Jon Greif's NPI active?

Yes — Jon Greif's NPI (1306958095) is active in the NPPES registry as of the last update on 2023-03-07.

IndividualActive

Jon Greif, D.O.

NPI 1306958095 · Surgery Physician · Oakland, CA

Jon Greif, D.O. is a Surgery Physician provider in Oakland, CA (NPI 1306958095).

Provider details

NPI number: 1306958095
Entity type: Individual
Primary specialty: Surgery PhysicianAllopathic & Osteopathic Physicians
Credential: D.O.
Sex: Male
Sole proprietor: No
License: 20A4984 (CA)

Specialties & taxonomies

Surgery PhysicianPrimary208600000XLicense 20A4984 (CA)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(90/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
19 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

3300 Webster St

Suite 212

Oakland, CA 94609-3117

Phone: (510) 835-9900

Fax: (510) 835-9909

Street-level locationGet directions

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Mailing address