Mark T Hellner MD Inc
NPI 1134442544 · Orthopaedic Surgery Physician · Merced, CA
Mark T Hellner MD Inc is a Orthopaedic Surgery Physician organization in Merced, CA (NPI 1134442544).
Provider details
- NPI number
- 1134442544
- Entity type
- Organization
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Hellner, Owner(209) 388-0730
- License
- G52055 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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
Mailing address
Registry dates
- Enumerated
- 2010-03-12
- Last updated
- 2010-08-31
Frequently asked questions
- What is Mark T Hellner MD Inc's NPI number?
- Mark T Hellner MD Inc's National Provider Identifier (NPI) is 1134442544, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark T Hellner MD Inc?
- Mark T Hellner MD Inc is classified in the NPPES registry as Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Mark T Hellner MD Inc located?
- Mark T Hellner MD Inc's practice location on file with NPPES is 900 W Olive Ave, Merced, CA 95348-2401.
- What is Mark T Hellner MD Inc's phone number?
- The practice phone number listed in the NPPES registry for Mark T Hellner MD Inc is (209) 388-0730.
- Who is the authorized official for Mark T Hellner MD Inc?
- The authorized official listed on Mark T Hellner MD Inc's NPPES record is Mark Hellner, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark T Hellner MD Inc's NPI active?
- Yes — Mark T Hellner MD Inc's NPI (1134442544) is active in the NPPES registry as of the last update on 2010-08-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.