NPPES file of Aug 9, 2026

Sullyvan W. Tang, M.D.

Internal Medicine Physician · Seal Beach, CA

Sullyvan W. Tang, M.D. is an internal medicine physician with a practice address in Seal Beach, California, and NPI 1770549206, issued on Apr 24, 2006. Check the license (California A60959, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1770549206
Name
Sullyvan W. Tang
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
A60959 CA
Self-reported in NPPES; status is on the state search
Practice location
1661 Golden Rain RD, Seal Beach, CA 90740
Phone
(562) 493-9581
Enumerated
Apr 24, 2006
Record last updated
Nov 30, 2025
Fax
(562) 795-6389
Medicare enrollment
Enrolled (PECOS I20040205000215); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 1661 Golden Rain RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Vivien Alabata, PTAPhysical Therapy Assistant1013867209
  2. Sophia Chun, MDInternal Medicine Physician1104939990
  3. Christopher ChungFamily Medicine Physician1578957049
  4. Melissa Dassanayake, LCSWMental Health Counselor1679973051
  5. Ellen Dayon, MDGeriatric Medicine (Internal Medicine) Physician1043279359
  6. Rudolf Haider, MDFamily Medicine Physician1740249069

Verify Sullyvan W. Tang in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A60959    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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73% more Medicare Part D claims than the average internal medicine physician in 2024

5,508 Medicare Part D claims for 484 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 124 claims were for opioids.

  1. Sullyvan Tang5,508
  2. Specialty average3,176

Most prescribed

  1. Rosuvastatin Calcium342 claims
  2. Atorvastatin Calcium297 claims
  3. Levothyroxine Sodium234 claims
  4. Amlodipine Besylate190 claims
  5. Losartan Potassium173 claims
  6. Lisinopril169 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $23.00

1 payment: food and beverage; the largest payer was Medtronic, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Sullyvan Tang$23.00
  2. Specialty average$1,303.06

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through 2 group practices

  1. Centers For Family Medicine GPSeal Beach, CA
  2. Healthcare Partners Affiliates Medical GroupSeal Beach, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Sullyvan W. Tang among 17,696 internal medicine physician records in California

Sullyvan W. Tang, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 56% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 63% of these records are
  • Graduated1995 · median 2004 among the 11,065 with a school on file
  • Record last updated2025 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Internal Medicine Physician providers in California

There are 17,696 internal medicine physician records in California.

All 17,696 in California → Every provider in Seal Beach → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Sophia Chun, MDSeal Beach, CA 907401104939990
  2. Jaraad HuqSeal Beach, CA 907401275114027
  3. Homan Siman, MDWilmington, CA 907441558456814
  4. Emma Trejo, MDWilmington, CA 907441043387954
  5. Estrella Aguinaldo, M.D.Carson, CA 907451548339278
  6. Maria Cecilia Canlas, MDCarson, CA 907451558362905
  7. Lynn Coates, MDCarson, CA 907451851380315
  8. Reza Ghanian, MDCarson, CA 907451639151350

Common questions

What is Sullyvan W. Tang, M.D.'s NPI number?

Sullyvan W. Tang, M.D.'s National Provider Identifier (NPI) is 1770549206, issued on Apr 24, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Sullyvan W. Tang, M.D. located?

The NPPES record lists a practice address at 1661 Golden Rain RD, Seal Beach, CA, 90740. Phone: (562) 493-9581. Providers update this record themselves, so call before visiting.

How can I verify Sullyvan W. Tang, M.D.'s license?

NPPES lists California license number A60959, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Sullyvan W. Tang, M.D. prescribe under Medicare Part D?

In 2024, Sullyvan W. Tang, M.D. had 5,508 Medicare Part D claims for 484 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.