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DR. MICHAEL TANG MD
NPI 1912469446
Internal Medicine in Winters, CA

Active since April 03, 2019PECOS EnrolledAccepts Medicare Assignment
101 MAIN STREET, WINTERS, CA 95694(530) 334-7184(530) 334-7186 Get Directions Write a Review

NPPES record last updated: September 12, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 12, 2025, Aug 9, 2022, Feb 3, 2022 and 1 more (4 updates tracked since 2019).

About Dr. Michael Tang Md NPPES

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

DR. MICHAEL TANG MD (NPI 1912469446) is an individual internal medicine provider in Winters, California, licensed in California (A182335) and active in the NPI registry since April 2019. He is enrolled in Medicare PECOS and is a graduate of Other (2019).

NPPES Registry Identity

NPI1912469446
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. MICHAEL TANGCredential: MD
Location Address101 MAIN STREETWinters, CA 95694
Mailing Address101 Main StreetWinters, CA 95694 · (530) 334-7184 · Fax (530) 334-7186
Phone(530) 334-7184
Fax(530) 334-7186
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateApril 3, 2019
Last NPPES UpdateSeptember 12, 20254 updates tracked since enumeration
NPPES CertifiedSeptember 12, 2025
✔ NPI 1912469446 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in CA · A182335✔ Licensed in OH · 35.143391
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

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 Tang Md 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 ID5597099382
PECOS Enrollment IDI20230524002641
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

4

Medicare enrollment records show Michael Tang reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Northbay Health Medical Foundation
Internal Medicine
4500 BUSINESS CENTER DR
Fairfield, CA 94534
  • Reassigned Medicare billing, California enrollment
  • 225 clinicians in this Medicare group
NPI 1760283527 (707) 646-3110
Northbay Healthcare Group
General Acute Care Hospital
1000 NUT TREE RD
Vacaville, CA 95687
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Northbay Physicians Surgery Center, LLC
  • 516 clinicians in this Medicare group
NPI 1255483202 (707) 646-3401
Permanente Medical Group Inc
Internal Medicine
710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1073606299 (408) 851-1000
Quantum Healthcare Medical Associates Inc.
Hospitalist
400 N PEPPER AVE
Colton, CA 92324
  • Reassigned Medicare billing, California enrollment
  • 338 clinicians in this Medicare group
NPI 1568490597 (909) 580-1000

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

Areas of Expertise CMS Part B claims

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.

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
58 services56 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95694 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
$137.20 typical visit price
range $60.44 – $180.85
Typical copayment $34.30 (range $15.11 – $45.21)
Most-billed visit code 99204
Established Patient
$105.95 typical visit price
range $19.88 – $148.15
Typical copayment $26.48 (range $4.97 – $37.03)
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.

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 Tang's NPI number?

The NPI number for Michael Tang is 1912469446. It was assigned to this individual provider in the NPPES registry on April 3, 2019.

Where is Michael Tang located?

Michael Tang practices at 101 Main Street, Winters, CA 95694. The listed phone number is (530) 334-7184.

What is Michael Tang's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Michael Tang enrolled in Medicare?

Yes. Michael Tang 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 Michael Tang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Tang reassigns Medicare benefits to 4 organizations: Northbay Health Medical Foundation (Fairfield, CA), Northbay Healthcare Group (Vacaville, CA), Permanente Medical Group Inc (Santa Clara, CA) and Quantum Healthcare Medical Associates Inc. (Colton, 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 Michael Tang'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 Tang was last updated on September 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.