Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

MS. Gregory James Markman, RN

Individual provider Critical Care Medicine Registered Nurse · NPI 1972114650

MS. Gregory James Markman, RN is registered under Certified Registered Nurse Anesthetist (CRNA) in Oakland, California. Qualified in 2022, 4 years ago. Practices with Oak Creek Anesthesia Services Inc, a 61-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
4
Licensed in
CA
In the registry since
2020
Specialties on file
2
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

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Practice location Address checks out

2181 Trafalgar Pl
Oakland, CA 94611-3245
Phone: (539) 219-8826
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence 95002033 (CA)
Critical Care Medicine Registered Nurse Taxonomy 163WC0200X · Licence 95119575 (CA)

Record details

NPI number1972114650
Entity typeIndividual (Type 1)
GenderMale
Credentials RN
Sole proprietorNo
NPI enumeratedAugust 14, 2020
Last updated in NPPESApril 14, 2023
Certification dateApril 14, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Oak Creek Anesthesia Services Inc — 61 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients144
Services billed 146 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Kaweah Health Medical Center Hospital · Visalia, CA

Colleagues at Oak Creek Anesthesia Services Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 61 clinicians in the practice; 12 are shown here.

Other providers in Oakland