Joyce Sun, CRNP
Adult Medicine Physician · Rockville, MD
Joyce Sun, CRNP is an adult medicine physician with a practice address in Rockville, Maryland, and NPI 1932588662, issued on May 27, 2015. Check the license (Maryland R175445, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Joyce Sun
- Credential
- CRNP
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- R175445 MD
Self-reported in NPPES; status is on the state search - Practice location
- 15245 Shady Grove RD Ste 130, Rockville, MD 20850
- Phone
- (240) 426-0130
- Enumerated
- May 27, 2015
- Record last updated
- Oct 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 59 in Maryland → Look up another NPI →
Also registered at 15245 Shady Grove RD Ste 130
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Bruntel, D.O.Internal Medicine Physician1114102134
- Carol Dodson, AGNPPrimary Care Nurse Practitioner1912420811
- Nicole Fuondjing, NPFamily Nurse Practitioner1750913380
- Jinhyun Hwang, FNP-CFamily Nurse Practitioner1164936266
- Avneet Kaur, CRNPFamily Nurse Practitioner1144704735
- Kimberly Martindell, RNRegistered Nurse1336720523
Verify Joyce Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license R175445Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average adult medicine physician in 2024
929 Medicare Part D claims for 76 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Amlodipine Besylate64 claims
- Losartan Potassium51 claims
- Quetiapine Fumarate47 claims
- Levothyroxine Sodium33 claims
- Basaglar Kwikpen U-10031 claims
- Lisinopril26 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: $444.83
4 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 664 providers of this specialty with any payment received $1,405.95 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.
Joyce Sun among 59 adult medicine physician records in Maryland
Joyce Sun, CRNP is one of 59 adult medicine physician records with a practice address in Maryland. 63% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 66% of them.
- NPI issued2015 · 66% of these records are older, 29% newer
- In a Medicare fileYes · 63% of these records are
- In the CMS Doctors and Clinicians fileNo · 51% of these records are
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in Maryland
There are 59 adult medicine physician records in Maryland.
All 59 in Maryland → Every provider in Rockville → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Kum Lee, M.D.Rockville, MD 208501114273844
- Xavier Kee, MDRockville, MD 208521437446960
- Dennis Hannon, M.D.Olney, MD 208321053314815
- Jonathan Maltz, M.D.Olney, MD 208321326041179
- Elsie KamaraGermantown, MD 208761982437554
- Mikhail Gendel, M.D.Gaithersburg, MD 208771235178344
- Ronald Greger, M.D.Gaithersburg, MD 208771922093723
- Stephen Kinney, MDChevy Chase, MD 208151972611051
Common questions
What is Joyce Sun, CRNP's NPI number?
Joyce Sun, CRNP's National Provider Identifier (NPI) is 1932588662, issued on May 27, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Joyce Sun, CRNP located?
The NPPES record lists a practice address at 15245 Shady Grove RD Ste 130, Rockville, MD, 20850. Phone: (240) 426-0130. Providers update this record themselves, so call before visiting.
How can I verify Joyce Sun, CRNP's license?
NPPES lists Maryland license number R175445, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joyce Sun, CRNP prescribe under Medicare Part D?
In 2024, Joyce Sun, CRNP had 929 Medicare Part D claims for 76 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.