Mark Zimmermann, LCSW-R
NPI 1275782179 · Addiction (Substance Use Disorder) Counselor · Bethesda, MD
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Zimmermann, LCSW-R is a Addiction (Substance Use Disorder) Counselor provider in Bethesda, MD (NPI 1275782179).
Provider details
- NPI number
- 1275782179
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- LCSW-R
- Sex
- Male
- Sole proprietor
- Yes
- License
- R081485 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 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
183 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 | 171 | $72 |
| Psychiatric Diagnostic Evaluation90791 | 12 | $118 |
Typical Medicare-allowed amounts for these services range $72–$118 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-09-16
- Last updated
- 2025-05-28
- Certified
- 2025-05-28
Frequently asked questions
- What is Mark Zimmermann's NPI number?
- Mark Zimmermann's National Provider Identifier (NPI) is 1275782179, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Zimmermann's specialty?
- Mark Zimmermann is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Mark Zimmermann located?
- Mark Zimmermann's practice location on file with NPPES is 4710 Elm St Apt W1304, Bethesda, MD 20814-3828.
- What is Mark Zimmermann's phone number?
- The practice phone number listed in the NPPES registry for Mark Zimmermann is (917) 830-3463.
- Does Mark Zimmermann accept Medicare?
- Mark Zimmermann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Zimmermann's NPI active?
- Yes — Mark Zimmermann's NPI (1275782179) is active in the NPPES registry as of the last update on 2025-05-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.