IndividualActive
Mark Napack
NPI 1942435003 · Mental Health Counselor · Rockville, MD
Mark Napack is a Mental Health Counselor provider in Rockville, MD (NPI 1942435003).
Provider details
- NPI number
- 1942435003
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- LC3076 (MD)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(85/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
6810 Montrose Rd
Rockville, MD 20852-4210
Phone: (301) 869-8428
Street-level locationGet directions
Mailing address
Po Box 631
Kensington, MD 20895-0631
Registry dates
- Enumerated
- 2009-05-19
- Last updated
- 2010-03-02
Frequently asked questions
- What is Mark Napack's NPI number?
- Mark Napack's National Provider Identifier (NPI) is 1942435003, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Napack's specialty?
- Mark Napack is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Mark Napack located?
- Mark Napack's practice location on file with NPPES is 6810 Montrose Rd, Rockville, MD 20852-4210.
- What is Mark Napack's phone number?
- The practice phone number listed in the NPPES registry for Mark Napack is (301) 869-8428.
- Is Mark Napack's NPI active?
- Yes — Mark Napack's NPI (1942435003) is active in the NPPES registry as of the last update on 2010-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.