Sergey L. Istomin, CRNP, PMHNP-BC
Psychiatric/Mental Health Nurse Practitioner · Bethesda, MD
Sergey L. Istomin, CRNP, PMHNP-BC is a psychiatric/mental health nurse practitioner with a practice address in Bethesda, Maryland, and NPI 1023384963, issued on Mar 26, 2012. Check the license (Maryland R208690, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sergey L. Istomin
- Credential
- CRNP, PMHNP-BC
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License number
- R208690 MD
Self-reported in NPPES; status is on the state search - Practice location
- 6040 Southport Dr, Bethesda, MD 20814
- Phone
- (301) 493-4200
- Enumerated
- Mar 26, 2012
- Record last updated
- Dec 3, 2013 (not updated in 13 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 2,373 in Maryland → Look up another NPI →
Also registered at 6040 Southport Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Clement Afforo, RNRegistered Nurse1225399819
- Olaitan AjiyanPsychiatric/Mental Health Nurse Practitioner1982544672
- Bayan Al Sulaihat, LCSW-CClinical Social Worker1265202188
- Jeffrey Bracken, LCSW-CClinical Social Worker1396909982
- Robin BrooksSocial Worker1134072911
- Elaine Byergo, LCSW-CClinical Social Worker1417985003
Verify Sergey L. Istomin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R208690Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
1,346 Medicare Part D claims for 106 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Clozapine118 claims
- Olanzapine77 claims
- Quetiapine Fumarate65 claims
- Divalproex Sodium53 claims
- Gabapentin49 claims
- Benztropine Mesylate48 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.
Sergey L. Istomin among 2,373 psychiatric/mental health nurse practitioner records in Maryland
Sergey L. Istomin, CRNP, PMHNP-BC is one of 2,373 psychiatric/mental health nurse practitioner records with a practice address in Maryland. 71% 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 9% of them.
- NPI issued2012 · 9% of these records are older, 86% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2013 · 19% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in Maryland
There are 2,373 psychiatric/mental health nurse practitioner records in Maryland.
All 2,373 in Maryland → Every provider in Bethesda → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Sasha Bergeron, NPBethesda, MD 208141679967889
- Michelle Binder, DNPBethesda, MD 208141063902088
- Connie Braybrook, PMHNPBethesda, MD 208141053685925
- Jennifer Brucie, CRNPBethesda, MD 208141437557337
- Agerie Ejigu, CRNP-PMHBethesda, MD 208141871044784
- Francine Kamhoua, CRNP-PMH, PMHNP-BCBethesda, MD 208141275145468
- Jae Hoon Kim, CRNP-PMHBethesda, MD 208141760726525
- Stephine Oparaugo, DNPBethesda, MD 208141801413448
Common questions
What is Sergey L. Istomin, CRNP, PMHNP-BC's NPI number?
Sergey L. Istomin, CRNP, PMHNP-BC's National Provider Identifier (NPI) is 1023384963, issued on Mar 26, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Sergey L. Istomin, CRNP, PMHNP-BC located?
The NPPES record lists a practice address at 6040 Southport Dr, Bethesda, MD, 20814. Phone: (301) 493-4200. Providers update this record themselves, so call before visiting.
How can I verify Sergey L. Istomin, CRNP, PMHNP-BC's license?
NPPES lists Maryland license number R208690, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does Sergey L. Istomin, CRNP, PMHNP-BC prescribe under Medicare Part D?
In 2024, Sergey L. Istomin, CRNP, PMHNP-BC had 1,346 Medicare Part D claims for 106 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. 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.