1. Home
  2. Directory
  3. California
  4. Healdsburg
  5. Family Medicine
  6. NPI Profile

DR. WALTER C. MAACK M.D.
NPI 1588765416
Family Medicine in Healdsburg, CA

Active since September 25, 2006
1375 UNIVERSITY AVENUE, HEALDSBURG DISTRICT HOSPITAL, HEALDSBURG, CA 95448(707) 431-6500 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Walter C. Maack M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WALTER C. MAACK M.D. (NPI 1588765416) is an individual family medicine provider in Healdsburg, California, licensed in California (G23577) and active in the NPI registry since September 2006.

NPPES Registry Identity

NPI1588765416
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. WALTER C. MAACKCredential: M.D.
Location Address1375 UNIVERSITY AVENUE, HEALDSBURG DISTRICT HOSPITALHealdsburg, CA 95448
Mailing AddressHealdsburg District Hospital, 1375 University AvenueHealdsburg, CA 95448 · (707) 431-6500
Phone(707) 431-6500
Sole ProprietorYes
Enumeration DateSeptember 25, 2006
Last NPPES UpdateSeptember 11, 2025
✔ NPI 1588765416 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · G23577
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Also ListedEmergency MedicineTaxonomy 207P00000X · License G23577 (CA)
1375 UNIVERSITY AVENUE, Healdsburg, CA 95448
Open in Google Maps ↗

Other Identifiers 1

Medicaid00G235770CA

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MARC D. PARIS M.D.
Emergency Medicine
1375 UNIVERSITY AVENUE, HEALDSBURG DISTRICT HOSPITAL
HEALDSBURG, CA 95448
Sonoma County (707) 431-6500
KEITH ENDERS LCSW
Social Worker (Clinical)
1375 UNIVERSITY AVENUE
HEALDSBURG, CA 95448
Sonoma County (707) 431-6500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Walter Maack's NPI number?

The NPI number for Walter Maack is 1588765416. It was assigned to this individual provider in the NPPES registry on September 25, 2006.

Where is Walter Maack located?

Walter Maack practices at 1375 University Avenue Healdsburg District Hospital, Healdsburg, CA 95448. The listed phone number is (707) 431-6500.

What is Walter Maack's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

When was this NPI record last updated?

The NPPES record for Walter Maack was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.