Clayton Aldon Alfonso, MD
Obstetrics & Gynecology Physician · Durham, NC
Clayton Aldon Alfonso, MD is an obstetrics & gynecology physician with a practice address in Durham, North Carolina, and NPI 1790028843, issued on Mar 27, 2013. Check the license (North Carolina 201602541, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- Clayton Aldon Alfonso
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 201602541 NC
0101278958 VA
Self-reported in NPPES; status is on the state search - Practice location
- 2301 Erwin RD, Durham, NC 27710
- Phone
- (919) 684-8111
- Enumerated
- Mar 27, 2013
- Record last updated
- Jul 24, 2026
- Medicare enrollment
- Enrolled (PECOS I20170703000529); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,548 in North Carolina → Look up another NPI →
Also registered at 2301 Erwin RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kelly AcharyaStudent in an Organized Health Care Education/Training Program1639436371
- Shqipe Ademi, PA-CPhysician Assistant1194354928
- Sonali Advani, M.B.B.S., MPHInfectious Disease Physician1174880280
- Marilyn AkyeaPrimary Care Nurse Practitioner1760068654
- Christopher AlleyCytopathology Physician1124293972
- Michael Allingham, M.D., PH.D.Retina Specialist (Ophthalmology) Physician1285878124
Verify Clayton Aldon Alfonso in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 201602541Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
57 Medicare Part D claims for 21 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol (Twice Weekly)12 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: $31.51
1 payment: food and beverage; the largest payer was Lilly USA, 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.
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
- Duke Health Integrated Practice IncRaleigh, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clayton Aldon Alfonso among 1,548 obstetrics & gynecology physician records in North Carolina
Clayton Aldon Alfonso, MD is one of 1,548 obstetrics & gynecology physician records with a practice address in North Carolina. 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 2013, is newer than 72% of them.
- NPI issued2013 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2013 · median 2007 among the 1,043 with a school on file
- Record last updated2026 · 48% 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 North Carolina 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 North Carolina
There are 1,548 obstetrics & gynecology physician records in North Carolina.
All 1,548 in North Carolina → Every provider in Durham → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Brita BoydDurham, NC 277101902989148
- Haywood Brown, M.D.Durham, NC 277101710060959
- Sarah Ellestad, M.D.Durham, NC 277101801979067
- Aimee Ferrandino, MDDurham, NC 277101407829815
- Stanley Filip, MDDurham, NC 277101982787149
- Tracy Gaudet, M.D.Durham, NC 277101861575029
- Lindsay Gray, M.D.Durham, NC 277101104909365
- Paula Lee, M.D.Durham, NC 277101477637387
Common questions
What is Clayton Aldon Alfonso, MD's NPI number?
Clayton Aldon Alfonso, MD's National Provider Identifier (NPI) is 1790028843, issued on Mar 27, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Clayton Aldon Alfonso, MD located?
The NPPES record lists a practice address at 2301 Erwin RD, Durham, NC, 27710. Phone: (919) 684-8111. Providers update this record themselves, so call before visiting.
How can I verify Clayton Aldon Alfonso, MD's license?
NPPES lists North Carolina license number 201602541, as entered by the provider. Search the North Carolina Medical Board at https://portal.ncmedboard.org/verification/search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Clayton Aldon Alfonso, MD prescribe under Medicare Part D?
In 2024, Clayton Aldon Alfonso, MD had 57 Medicare Part D claims for 21 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.
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.