IndividualActive
Mark Crystal
NPI 1336840123 · Registered Nurse · Grand Rapids, MI
Mark Crystal is a Registered Nurse provider in Grand Rapids, MI (NPI 1336840123).
Provider details
- NPI number
- 1336840123
- Entity type
- Individual
- Primary specialty
- Registered NurseNursing Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 4704352340 (MI)
Specialties & taxonomies
Nursing Service Providers
Profile Score
Established profile(59/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 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
5300 Patterson Ave Se Ste 100e
Grand Rapids, MI 49512-5663
Phone: (616) 222-5601
Street-level locationGet directions
Mailing address
1976 Glenn Canyon Dr Se
Caledonia, MI 49316-7688
Registry dates
- Enumerated
- 2023-03-17
- Last updated
- 2023-03-17
- Certified
- 2023-03-17
Frequently asked questions
- What is Mark Crystal's NPI number?
- Mark Crystal's National Provider Identifier (NPI) is 1336840123, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Crystal's specialty?
- Mark Crystal is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).
- Where is Mark Crystal located?
- Mark Crystal's practice location on file with NPPES is 5300 Patterson Ave Se Ste 100e, Grand Rapids, MI 49512-5663.
- What is Mark Crystal's phone number?
- The practice phone number listed in the NPPES registry for Mark Crystal is (616) 222-5601.
- Is Mark Crystal's NPI active?
- Yes — Mark Crystal's NPI (1336840123) is active in the NPPES registry as of the last update on 2023-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.