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MAYUMI PIERCE M.D.
NPI 1427390814
Psychiatry & Neurology - Psychiatry in San Francisco, CA

Active since March 23, 2013PECOS EnrolledAccepts Medicare Assignment
401 PARNASSUS BOX 0984-RTP, SAN FRANCISCO, CA 94143(415) 476-7577 Get Directions Write a Review

NPPES record last updated: September 11, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mayumi Pierce M.d. NPPES

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

MAYUMI PIERCE M.D. (NPI 1427390814) is an individual psychiatry provider in San Francisco, California, licensed in California (132445) and active in the NPI registry since March 2013. She is enrolled in Medicare PECOS and is a graduate of Other (2013).

NPPES Registry Identity

NPI1427390814
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameMAYUMI PIERCECredential: M.D.
Location Address401 PARNASSUS BOX 0984-RTPSan Francisco, CA 94143-0984
Mailing Address401 Parnassus Box 0984-rtpSan Francisco, CA 94143-0984
Phone(415) 476-7577
Sole ProprietorYes
Medical School CMSOtherGraduated 2013
Enumeration DateMarch 23, 2013
Last NPPES UpdateSeptember 11, 2014
✔ NPI 1427390814 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CA · 132445
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
401 PARNASSUS BOX 0984-RTP, San Francisco, CA 94143
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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

Mayumi Pierce 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 ID2567684061
PECOS Enrollment IDI20141118002068
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 Reassignments

2

Medicare enrollment records show Mayumi Pierce reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Meitri Collaborative
3.3 mi
Psychiatry
500 SUTTER ST STE 503
San Francisco, CA 94102
  • Reassigned Medicare billing, California enrollment
  • 2 clinicians in this Medicare group
NPI 1346772266 (310) 906-0407
Bay Psychiatric Associates
13 mi
Psychiatry
2020 MILVIA ST STE 440
Berkeley, CA 94704
  • Reassigned Medicare billing, California enrollment
  • 116 clinicians in this Medicare group
NPI 1427163229 (510) 204-4635

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 94143 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
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
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 4

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

TUA-ELISABETH MULLIGAN M.D.
Psychiatry & Neurology (Psychiatry)
401 PARNASSUS BOX 0984-RTP
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7577
ELIZABETH RAWSON
Student in an Organized Health Care Education/Training Program
401 PARNASSUS BOX 0984-RTP
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7577
ANDREA DENISE ROSATI MD, PHD
Psychiatry & Neurology (Psychiatry)
401 PARNASSUS BOX 0984-RTP
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7577
DR. KORY BENJAMIN COMBS M.D.
Psychiatry & Neurology (Psychiatry)
401 PARNASSUS BOX 0984-RTP
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7577

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 Mayumi Pierce's NPI number?

The NPI number for Mayumi Pierce is 1427390814. It was assigned to this individual provider in the NPPES registry on March 23, 2013.

Where is Mayumi Pierce located?

Mayumi Pierce practices at 401 Parnassus Box 0984-Rtp, San Francisco, CA 94143. The listed phone number is (415) 476-7577.

What is Mayumi Pierce's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Mayumi Pierce enrolled in Medicare?

Yes. Mayumi Pierce 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 organizations bill Medicare for Mayumi Pierce's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mayumi Pierce reassigns Medicare benefits to 2 organizations: Meitri Collaborative (San Francisco, CA) and Bay Psychiatric Associates (Berkeley, CA). Each 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 Mayumi Pierce'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 Mayumi Pierce was last updated on September 11, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.