Ross Ziegler, M.D.
NPI 1598902462 · Addiction Medicine (Family Medicine) Physician · Palo Alto, CA
Ross Ziegler, M.D. is a Addiction Medicine (Family Medicine) Physician provider in Palo Alto, CA (NPI 1598902462).
Provider details
- NPI number
- 1598902462
- Entity type
- Individual
- Primary specialty
- Addiction Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G40394 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 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
Mailing address
Registry dates
- Enumerated
- 2009-01-14
- Last updated
- 2009-01-14
Frequently asked questions
- What is Ross Ziegler's NPI number?
- Ross Ziegler's National Provider Identifier (NPI) is 1598902462, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ross Ziegler's specialty?
- Ross Ziegler is listed in the NPPES registry with a primary specialty of Addiction Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Ross Ziegler located?
- Ross Ziegler's practice location on file with NPPES is 544 Thain Way, Palo Alto, CA 94306-3920.
- What is Ross Ziegler's phone number?
- The practice phone number listed in the NPPES registry for Ross Ziegler is (650) 494-7090.
- Is Ross Ziegler's NPI active?
- Yes — Ross Ziegler's NPI (1598902462) is active in the NPPES registry as of the last update on 2009-01-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.