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MAY TUN M.D.
NPI 1851787717
Emergency Medicine in Fairfield, CA

Active since April 07, 2015PECOS EnrolledAccepts Medicare Assignment
4500 BUSINESS CENTER DR, FAIRFIELD, CA 94534(707) 646-5000 Get Directions Write a Review

NPPES record last updated: December 17, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Dec 17, 2021, May 29, 2019, Sep 26, 2016 (3 updates tracked since 2016).

About May Tun M.d. NPPES

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

MAY TUN M.D. (NPI 1851787717) is an individual emergency medicine provider in Fairfield, California, licensed in California (A154392) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS, maintains a secondary practice location in Detroit, and is a graduate of University Of Wisconsin School Of Medicine (2015).

NPPES Registry Identity

NPI1851787717
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameMAY TUNCredential: M.D.
Location Address4500 BUSINESS CENTER DRFairfield, CA 94534-6888
Mailing Address4500 Business Center DrFairfield, CA 94534-6888
Phone(707) 646-5000
Sole ProprietorNo
Medical School CMSUniversity Of Wisconsin School Of MedicineGraduated 2015
Enumeration DateApril 7, 2015
Last NPPES UpdateDecember 17, 20213 updates tracked since enumeration
✔ NPI 1851787717 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A154392
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
4500 BUSINESS CENTER DR, Fairfield, CA 94534
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Secondary Practice Location 1

Location 16071 W Outer DrDetroit, MI 48235-2624 · Phone (313) 966-1010

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

May Tun 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 ID8325340607
PECOS Enrollment IDI20180816000264
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 5

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
178 services172 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
150 services119 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
79 services77 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
60 services59 patients
Critical care, each additional 30 minutes 99292
Critical care refers to special attention given to patients facing life-threatening conditions. Each additional 30 minutes indicates the extension of this specialized care. This might include close monitoring, medication adjustments, and immediate interventions as needed.
45 services34 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94534 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
$98.85 typical visit price
range $65.02 – $191.95
Typical copayment $24.71 (range $16.25 – $47.98)
Most-billed visit code 99203
Established Patient
$113.05 typical visit price
range $21.86 – $157.69
Typical copayment $28.26 (range $5.46 – $39.42)
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 4

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

SOLANO DIAGNOSTICS PARTNERS, A CALIF LIMITED PARTNERSHIP
Radiology (Diagnostic Radiology)
4500 BUSINESS CENTER DR
FAIRFIELD, CA 94534
Solano County (707) 646-4777
DR. DOUGLAS GRANADA DADO DNP
Nurse Practitioner (Family)
4500 BUSINESS CENTER DR
FAIRFIELD, CA 94534
Solano County (707) 646-5000
NORTHBAY HEALTH MEDICAL FOUNDATION
Internal Medicine
4500 BUSINESS CENTER DR
FAIRFIELD, CA 94534
Solano County (707) 646-3110
SOLANO DIAGNOSTICS PARTNERS, A CALIF LIMITED PARTNERSHIP
Radiology (Diagnostic Radiology)
4500 BUSINESS CENTER DR
FAIRFIELD, CA 94534
Solano County (855) 820-5256

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 May Tun's NPI number?

The NPI number for May Tun is 1851787717. It was assigned to this individual provider in the NPPES registry on April 7, 2015.

Where is May Tun located?

May Tun practices at 4500 Business Center Dr, Fairfield, CA 94534. The listed phone number is (707) 646-5000.

What is May Tun's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is May Tun enrolled in Medicare?

Yes. May Tun 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 May Tun was last updated on December 17, 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.