Sergey Istomin, CRNP, PMHNP-BC
NPI 1023384963 · Psychiatric/Mental Health Nurse Practitioner · Bethesda, MD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sergey Istomin, CRNP, PMHNP-BC is a Psychiatric/Mental Health Nurse Practitioner provider in Bethesda, MD (NPI 1023384963).
Provider details
- NPI number
- 1023384963
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNP, PMHNP-BC
- Sex
- Male
- Sole proprietor
- No
- License
- R208690 (MD)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
409 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychotherapy, 45 Minutes90834 | 125 | $93 |
| Psychotherapy, 30 Minutes90832 | 77 | $70 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 59 | $119 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 53 | $120 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 37 | $13 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 34 | $167 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clozapine | 118 | 14 |
| Olanzapine | 77 | 18 |
| Quetiapine Fumarate | 65 | 18 |
| Divalproex Sodium | 53 | — |
| Gabapentin | 49 | — |
| Benztropine Mesylate | 48 | — |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 48 | 12 |
| Trazodone Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-03-26
- Last updated
- 2013-12-03
Frequently asked questions
- What is Sergey Istomin's NPI number?
- Sergey Istomin's National Provider Identifier (NPI) is 1023384963, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sergey Istomin's specialty?
- Sergey Istomin is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sergey Istomin located?
- Sergey Istomin's practice location on file with NPPES is 6040 Southport Dr, Bethesda, MD 20814-1848.
- What is Sergey Istomin's phone number?
- The practice phone number listed in the NPPES registry for Sergey Istomin is (301) 493-4200.
- Does Sergey Istomin accept Medicare?
- Sergey Istomin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sergey Istomin's NPI active?
- Yes — Sergey Istomin's NPI (1023384963) is active in the NPPES registry as of the last update on 2013-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.