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MONICA MARIA VILLAFANA DIAZ PA-C
NPI 1790488302
Physician Assistant in Oakland, CA

Active since March 23, 2023PECOS EnrolledAccepts Medicare Assignment
3100 TELEGRAPH AVE, OAKLAND, CA 94609(800) 607-6377 Get Directions Write a Review

NPPES record last updated: March 23, 2023. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Monica Maria Villafana Diaz Pa-c NPPES

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

MONICA MARIA VILLAFANA DIAZ PA-C (NPI 1790488302) is an individual physician assistant in Oakland, California, licensed in California (62516) and active in the NPI registry since March 2023. She is enrolled in Medicare PECOS and is a graduate of Other (2022).

NPPES Registry Identity

NPI1790488302
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameMONICA MARIA VILLAFANA DIAZCredential: PA-C
Location Address3100 TELEGRAPH AVEOakland, CA 94609-3239
Mailing Address931 Eleanor AveSacramento, CA 95815-1725 · (916) 333-9262
Phone(800) 607-6377
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateMarch 23, 2023
NPPES CertifiedMarch 23, 2023
✔ NPI 1790488302 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in CA · 62516
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
3100 TELEGRAPH AVE, Oakland, CA 94609
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Monica Maria Villafana Diaz Pa-c 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 ID4880049899
PECOS Enrollment IDI20231011002908
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.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
21 services21 patients
Annual alcohol misuse screening, 5 to 15 minutes G0442
An annual alcohol misuse screening is a 15-minute check-up to assess your drinking habits. It helps identify if you're consuming alcohol in a way that could harm your health. This is not a judgment, but a tool to promote your wellbeing.
21 services21 patients
Annual depression screening, 5 to 15 minutes G0444
An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.
17 services17 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94609 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
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 20

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

JASON ANTHONY-JAVON SAUNDERS
Physician Assistant
3100 TELEGRAPH AVE
OAKLAND, CA 94609
Alameda County (800) 607-6377
SHARON SHIGEKO LEAF PHARMD
Pharmacist
3100 TELEGRAPH AVE, SUITE 1100
OAKLAND, CA 94609
Alameda County (510) 869-6818
NICOLE HELENE ARMSTRONG
Student in an Organized Health Care Education/Training Program
3100 TELEGRAPH AVE
OAKLAND, CA 94609
Alameda County (800) 607-6377
ALEJANDRA LOPEZ
Student in an Organized Health Care Education/Training Program
3100 TELEGRAPH AVE
OAKLAND, CA 94609
Alameda County (800) 607-6377
JULIANA PASTORE BSN, RN, CCRN
Nurse Anesthetist, Certified Registered
3100 TELEGRAPH AVE
OAKLAND, CA 94609
Alameda County (800) 607-6377
JESSICA YU PA
Physician Assistant
3100 TELEGRAPH AVE
OAKLAND, CA 94609
Alameda County (800) 607-6377
ELIZABETH MOYER PA-C
Physician Assistant
3100 TELEGRAPH AVE
OAKLAND, CA 94609
Alameda County (510) 879-9257
NOELLE HENNIG
Nurse Anesthetist, Certified Registered
3100 TELEGRAPH AVE
OAKLAND, CA 94609
Alameda County (510) 879-9200

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 Monica Maria Diaz's NPI number?

The NPI number for Monica Maria Diaz is 1790488302. It was assigned to this individual provider in the NPPES registry on March 23, 2023.

Where is Monica Maria Diaz located?

Monica Maria Diaz practices at 3100 Telegraph Ave, Oakland, CA 94609. The listed phone number is (800) 607-6377.

What is Monica Maria Diaz's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Monica Maria Diaz enrolled in Medicare?

Yes. Monica Maria Diaz 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.

When was this NPI record last updated?

The NPPES record for Monica Maria Diaz was last updated on March 23, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.