Melissa Ling Mao, MD
Surgical Oncology Physician · Orange, CA
Melissa Ling Mao, MD is a surgical oncology physician with a practice address in Orange, California, and NPI 1245594498, issued on Jul 2, 2012. Check the license (California A167735, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Melissa Ling Mao
- Credential
- MD
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License numbers
- A167735 CA
MD465525 PA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S Bldg 23, Orange, CA 92868
- Phone
- (714) 456-8000
- Enumerated
- Jul 2, 2012
- Record last updated
- Jun 2, 2025
- Medicare enrollment
- Enrolled (PECOS I20200421001796); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 250 in California → Look up another NPI →
Also registered at 101 The City Dr S Bldg 23
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Annamarie Bedia, NPNurse Practitioner1780875005
- Elizabeth Brem, MDHematology & Oncology Physician1578883781
- Zahra Sadat Hamedi, MDHematology & Oncology Physician1053974451
- Krishna Hanubal, MDRadiation Oncology Physician1568154458
- Garrett Harada, MDRadiation Oncology Physician1831726330
- Jeremy Harris, MDRadiation Oncology Physician1922427053
Verify Melissa Ling Mao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A167735Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average surgical oncology physician in 2024
17 Medicare Part D claims for 15 beneficiaries, against an average of 87 among the 1,237 providers of this specialty who prescribed in Part D.
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: $261.79
3 payments; by number, the most common kind was food and beverage; the largest payer was Corcept Therapeutics. The 1,132 providers of this specialty with any payment received $4,224.74 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- University Surgeons OF Orange A Medical GroupOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Melissa Ling Mao among 250 surgical oncology physician records in California
Melissa Ling Mao, MD is one of 250 surgical oncology physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 71% of them.
- NPI issued2012 · 71% of these records are older, 24% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2012 · median 2004 among the 184 with a school on file
- Record last updated2025 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in California
There are 250 surgical oncology physician records in California.
All 250 in California → Every provider in Orange → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Valentina BonevOrange, CA 928681326312075
- John A Butler, MDOrange, CA 928681902986094
- Oliver Eng, M.D.Orange, CA 928681245556406
- James Jakowatz, MDOrange, CA 928681649225384
- Karen T Lane, MDOrange, CA 928681316027444
- Erin Lin, D.O.Orange, CA 928681780983411
- Alexandra Lopez-Aguiar, M.D.Orange, CA 928681477972040
- Thuy Tran, M.D.Orange, CA 928681851736938
Common questions
What is Melissa Ling Mao, MD's NPI number?
Melissa Ling Mao, MD's National Provider Identifier (NPI) is 1245594498, issued on Jul 2, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Melissa Ling Mao, MD located?
The NPPES record lists a practice address at 101 The City Dr S Bldg 23, Orange, CA, 92868. Phone: (714) 456-8000. Providers update this record themselves, so call before visiting.
How can I verify Melissa Ling Mao, MD's license?
NPPES lists California license number A167735, 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 Melissa Ling Mao, MD prescribe under Medicare Part D?
In 2024, Melissa Ling Mao, MD had 17 Medicare Part D claims for 15 beneficiaries; the average among surgical oncology physician prescribers was 87. 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.
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.