Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Mr. Sergey L Istomin, CRNP, PMHNP-BC

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1023384963

Mr. Sergey L Istomin, CRNP, PMHNP-BC is a Psychiatric/Mental Health Nurse Practitioner in Bethesda, Maryland. Licensed in Maryland. Registered with an NPI since 2012.

Licensed in
MD
In the registry since
2012
What do these letters mean?
CRNP — Certified Registered Nurse Practitioner
The title Pennsylvania and some other states use for a nurse practitioner.
PMHNP-BC — Psychiatric-Mental Health Nurse Practitioner, Board Certified
A board-certified psychiatric nurse practitioner.

See every abbreviation used in this directory →

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Practice location Address checks out

6040 Southport Dr
Bethesda, MD 20814-1848 Not confirmed with CMS for 12 years — call before visiting
Phone: (301) 493-4200
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence R208690 (MD)

Record details

NPI number1023384963
Entity typeIndividual (Type 1)
GenderMale
Credentials CRNP , PMHNP-BC
Sole proprietorNo
NPI enumeratedMarch 26, 2012
Last updated in NPPESDecember 3, 2013

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients177
Services billed 453 a service is one billed item, such as a visit, a test or a procedure
Average patient age59

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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