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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

ROBERT C MESSER
NPI 1679484398
Case Manager/Care Coordinator in Sonora, CA

Active since September 14, 2026
20001 HIGHWAY 108, SONORA, CA 95370(209) 588-6164 Get Directions Write a Review

NPPES record added: September 14, 2026. Verified against the NPPES registry weekly; last sync: September 27, 2026.

About Robert C Messer NPPES

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

ROBERT C MESSER (NPI 1679484398) is an individual case manager/care coordinator provider in Sonora, California and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1679484398
Entity TypeIndividualMale
Primary Taxonomy171M00000X
Provider Legal NameROBERT C MESSER
Location Address20001 HIGHWAY 108Sonora, CA 95370-8422
Mailing Address19401 Susan WaySonora, CA 95370-9266 · (209) 588-6164
Phone(209) 588-6164
Sole ProprietorNo
Enumeration DateSeptember 14, 2026
NPPES CertifiedSeptember 14, 2026
✔ NPI 1679484398 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCase Manager/Care CoordinatorOther Service Providers
Taxonomy Code171M00000X
Definition
A person who provides case management services and assists an individual in gaining access to needed medical, social, educational, and/or other services. The person has the ability to provide an assessment and review of completed plan of care on a periodic basis. This person is also able to take collaborative action to coordinate the services with other providers and monitor the enrollee's progress toward the cost-effective achievement of objectives specified in the plan of care. Credentials may vary from an experience in the fields of psychology, social work, rehabilitation, nursing or a closely related human service field, to a related Assoc of Arts Degree or to nursing credentials. Some states may require certification in case management.
20001 HIGHWAY 108, Sonora, CA 95370
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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.

MARILYN JEAN MARTINO
Counselor (Addiction (Substance Use Disorder))
20001 HIGHWAY 108
SONORA, CA 95370
Tuolumne County (209) 588-7018
STEPHANIE LOUISE FOSTER R1500630323
Counselor (Addiction (Substance Use Disorder))
20001 HIGHWAY 108
SONORA, CA 95370
Tuolumne County (209) 459-0820

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 Robert Messer's NPI number?

The NPI number for Robert Messer is 1679484398. It was assigned to this individual provider in the NPPES registry on September 14, 2026.

Where is Robert Messer located?

Robert Messer practices at 20001 Highway 108, Sonora, CA 95370. The listed phone number is (209) 588-6164.

What is Robert Messer's specialty?

The primary specialty registered for this NPI is Case Manager/Care Coordinator with taxonomy code 171M00000X.

When was this NPI record last updated?

The NPPES record for Robert Messer was last updated on September 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days 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.