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DR. MICHAEL E VOLLMER M.D.
NPI 1457379174
Internal Medicine - Infectious Disease in Walnut Creek, CA

Active since July 18, 2006PECOS EnrolledAccepts Medicare Assignment
365 LENNON LN, SUITE 200, WALNUT CREEK, CA 94598(925) 947-2334(925) 947-5889 Get Directions Write a Review

NPPES record last updated: December 22, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Michael E Vollmer M.d. NPPES

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

DR. MICHAEL E VOLLMER M.D. (NPI 1457379174) is an individual infectious disease provider in Walnut Creek, California, licensed in California (A81389) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Minnesota Medical School (2001).

NPPES Registry Identity

NPI1457379174
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameDR. MICHAEL E VOLLMERCredential: M.D.
Location Address365 LENNON LN, SUITE 200Walnut Creek, CA 94598-5910
Mailing Address365 Lennon Ln, Suite 200Walnut Creek, CA 94598-5910 · (925) 947-2334 · Fax (925) 947-5889
Phone(925) 947-2334
Fax(925) 947-5889
Sole ProprietorNo
Medical School CMSUniversity Of Minnesota Medical SchoolGraduated 2001
Enumeration DateJuly 18, 2006
Last NPPES UpdateDecember 22, 2021
✔ NPI 1457379174 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · A81389
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
365 LENNON LN, Walnut Creek, CA 94598
Open in Google Maps ↗

Other Identifiers 1

Medicaid00A813890CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Michael E Vollmer M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3274533443
PECOS Enrollment IDI20070111000556
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Michael Vollmer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
18 mi
Internal Medicine
901 NEVIN
Richmond, CA 94801
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1235226531 (510) 307-1555

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 19

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

MS. TERILYN ANN VOEGTLE APRN, BC
Nurse Practitioner (Adult Health)
365 LENNON LN, SUITE 210
WALNUT CREEK, CA 94598
Contra Costa County (925) 944-1110
KONARK SHARMA M.D.
Internal Medicine (Infectious Disease)
365 LENNON LN, 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334
INFECTIOUS DISEASE DOCTORS MEDICAL GROUP APC
Internal Medicine (Infectious Disease)
365 LENNON LN, SUITE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334
DR. MIRA LIM M.D.
Ophthalmology
365 LENNON LN, STE 210
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-0888
BAY AREA COLON & RECTAL SURGEONS
Surgery
365 LENNON LN, SUITE 290
WALNUT CREEK, CA 94598
Contra Costa County (925) 274-9000
DR. RONALD B WASSERMAN M.D.
Internal Medicine (Infectious Disease)
365 LENNON LN, SUITE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334
DR. JORGE R BERNETT M.D.
Internal Medicine (Infectious Disease)
365 LENNON LN, SUITE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334
DEVIN T CALLISTER M.D.
Internal Medicine (Infectious Disease)
365 LENNON LN, SUITE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334

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 Michael Vollmer's NPI number?

The NPI number for Michael Vollmer is 1457379174. It was assigned to this individual provider in the NPPES registry on July 18, 2006.

Where is Michael Vollmer located?

Michael Vollmer practices at 365 Lennon Ln Suite 200, Walnut Creek, CA 94598. The listed phone number is (925) 947-2334.

What is Michael Vollmer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Michael Vollmer enrolled in Medicare?

Yes. Michael Vollmer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Michael Vollmer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Vollmer reassigns Medicare benefits to Permanente Medical Group Inc (Richmond, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Michael Vollmer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Michael Vollmer was last updated on December 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.