Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John M. Grollmus, MD, Inc

Organization Neurological Surgery Physician · NPI 1851337380

John M. Grollmus, MD, Inc is a Neurological Surgery Physician in Santa Rosa, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

990 Sonoma Ave Ste 20 &21
Santa Rosa, CA 95404-4802
Phone: (707) 525-0696
Fax: (707) 525-8404
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence C27979 (CA)

Record details

NPI number1851337380
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official John Grollmus — Owner/ Lead Physician · (707) 525-0696
NPI enumeratedJune 22, 2006
Last updated in NPPESAugust 22, 2020
Mailing address990 Sonoma Ave, Ste. 20 &21, Santa Rosa, CA 95404-4802

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