Pei Fang Sun, MD
Internal Medicine Physician · Wallingford, CT
Pei Fang Sun, MD is an internal medicine physician with a practice address in Wallingford, Connecticut, and NPI 1225171754, issued on Feb 15, 2007. Check the license (Connecticut 37546, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Pei Fang Sun
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 37546 CT
Self-reported in NPPES; status is on the state search - Practice location
- 850 N Main Street Ext, Wallingford, CT 06492
- Phone
- (203) 269-4353
- Enumerated
- Feb 15, 2007
- Record last updated
- Aug 6, 2026
- Fax
- (203) 269-4606
- Medicare enrollment
- Enrolled (PECOS I20100928001103); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 850 N Main Street Ext
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anant Agarwalla, M.D.Gastroenterology Physician1326458589
- Laura Berndt, DPTOrthopedic Physical Therapist1528434867
- Crystal Boyarsky, FNPNurse Practitioner1225850092
- Anatoly Braylovsky, MDInternal Medicine Physician1023004124
- Patricia Buckley, L.AC.Acupuncturist1568660314
- Michael Clark, MDFamily Medicine Physician1912903949
Verify Pei Fang Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 37546Check 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% more Medicare Part D claims than the average internal medicine physician in 2024
5,233 Medicare Part D claims for 814 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 19 claims were for opioids.
Most prescribed
- Amlodipine Besylate352 claims
- Levothyroxine Sodium264 claims
- Rosuvastatin Calcium251 claims
- Atorvastatin Calcium234 claims
- Losartan Potassium172 claims
- Metformin Hcl160 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: $55.15
2 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. 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.
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
- Pei Sun Md.llcWallingford, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Pei Fang Sun among 2,623 internal medicine physician records in Connecticut
Pei Fang Sun, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% 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, 44% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1983 · median 2004 among the 1,646 with a school on file
- Record last updated2026 · 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 Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
32 internal medicine physician records list a practice address in Wallingford
They are 32 of the 863 NPPES records with a practice address in Wallingford, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Wallingford → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Muhammad Al Mounayer, M.D.Wallingford, CT 064921093717837
- Alla Bernshteyn, MDWallingford, CT 064921063499507
- Anatoly Braylovsky, MDWallingford, CT 064921023004124
- Santosh Doddamane, DOWallingford, CT 064921669491775
- Vicki Ehrlich, M.D.Wallingford, CT 064921639150337
- Sarah Finnegan, MDWallingford, CT 064921164501763
- Sue-Ellen Franklyn-Benson, M.D.Wallingford, CT 064921245288265
- Jordan Goetz, MDYalesville, CT 064921104893171
Common questions
What is Pei Fang Sun, MD's NPI number?
Pei Fang Sun, MD's National Provider Identifier (NPI) is 1225171754, issued on Feb 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Pei Fang Sun, MD located?
The NPPES record lists a practice address at 850 N Main Street Ext, Wallingford, CT, 06492. Phone: (203) 269-4353. Providers update this record themselves, so call before visiting.
How can I verify Pei Fang Sun, MD's license?
NPPES lists Connecticut license number 37546, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Pei Fang Sun, MD prescribe under Medicare Part D?
In 2024, Pei Fang Sun, MD had 5,233 Medicare Part D claims for 814 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.
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.