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 provides Neurological Surgery Physician services 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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