NPPES file of Aug 9, 2026

Johanna Su, M.D.

Obstetrics & Gynecology Physician · Fullerton, CA

Johanna Su, M.D. is an obstetrics & gynecology physician with a practice address in Fullerton, California, and NPI 1255547725, issued on May 14, 2007. Check the license (California A 107493, 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
1255547725
Name
Johanna Su
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License numbers
A 107493 CA
4301085979 MI
Self-reported in NPPES; status is on the state search
Practice location
101 Laguna RD Ste 100, Fullerton, CA 92835
Phone
(714) 992-5350
Enumerated
May 14, 2007
Record last updated
Nov 10, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(714) 992-8156
Medicare enrollment
Enrolled (PECOS I20091201000642); accepts Medicare assignment
Medical or professional school
Northeastern Ohio University College Of Medicine, 2005
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 obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →

Also registered at 101 Laguna RD Ste 100

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

  1. Carla Betters, NPWomen's Health Nurse Practitioner1700258472
  2. Laura Biardi, CNMAdvanced Practice Midwife1639286792
  3. Christina BuchananObstetrics & Gynecology Physician1750818357
  4. Dennis Buchanan, MDObstetrics & Gynecology Physician1003864737
  5. Brian Gray, MDObstetrics & Gynecology Physician1457316705
  6. Cynthia Limon, PAPhysician Assistant1558009332

Verify Johanna Su in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A 107493    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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48% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024

85 Medicare Part D claims for 40 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.

  1. Johanna Su85
  2. Specialty average165

Most prescribed

  1. Estradiol17 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: $13.32

1 payment: food and beverage; the largest payer was Hologic Sales and Service, LLC. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Johanna Su$13.32
  2. Specialty average$1,030.61

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

Bills Medicare through one group practice

  1. Providence Medical FoundationFullerton, CA

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

Johanna Su among 5,088 obstetrics & gynecology physician records in California

Johanna Su, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.

  • NPI issued2007 · 48% of these records are older, 38% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 53% of these records are
  • Graduated2005 · median 2004 among the 2,700 with a school on file
  • Record last updated2021 · 64% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Obstetrics & Gynecology Physician providers in California

There are 5,088 obstetrics & gynecology physician records in California.

All 5,088 in California → Every provider in Fullerton → Obstetrics & Gynecology Physician nationwide →

The 8 obstetrics & gynecology physician records with the nearest ZIP codes

  1. Christina Borsari, MDFullerton, CA 928351356308704
  2. Dennis Buchanan, MDFullerton, CA 928351003864737
  3. Christina BuchananFullerton, CA 928351750818357
  4. Minette Finney, MDFullerton, CA 928351750960571
  5. Theresa Franks, MDFullerton, CA 928351396700704
  6. Earl Fuller, M.D.Fullerton, CA 928351053684951
  7. Brian Gray, MDFullerton, CA 928351457316705
  8. Donald Henderson, MDFullerton, CA 928351447217898

Common questions

What is Johanna Su, M.D.'s NPI number?

Johanna Su, M.D.'s National Provider Identifier (NPI) is 1255547725, issued on May 14, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Johanna Su, M.D. located?

The NPPES record lists a practice address at 101 Laguna RD Ste 100, Fullerton, CA, 92835. Phone: (714) 992-5350. Providers update this record themselves, so call before visiting.

How can I verify Johanna Su, M.D.'s license?

NPPES lists California license number A 107493, 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 Johanna Su, M.D. prescribe under Medicare Part D?

In 2024, Johanna Su, M.D. had 85 Medicare Part D claims for 40 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.