STEPHEN A. MAYER M.D. – NPI #1982678975
Internal Medicine

An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

Health Care Provider Taxonomy Code for Internal Medicine

STEPHEN MAYER is a physician located in SIERRA VISTA, AZ. NPPES has assigned the NPI number 1982678975 to STEPHEN MAYER on February 15, 2006. It is a Type-1 NPI, indicating this NPI number is associated with an individual. The primary taxonomy selected by this provider is 207RH0003X from the Health Care Provider Taxonomy code set, which is classified as Internal Medicine, specializing in Hematology & Oncology

The NPI profile was last updated on Jul 23, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for STEPHEN MAYER below.

NPI Profile for
STEPHEN A. MAYER

NPI Number
1982678975
Enumeration Date

(more than 20 years ago)
Entity Type
Type-1  Individual (Male)
Legal Name
STEPHEN A. MAYER
Credentials
M.D.
Primary location
5151 E HIGHWAY 90
SIERRA VISTA, AZ 85635-2436
Phone: (520) 803-6644 Fax: (520) 459-3193
1 Other location(s):
2375 S Ridgeview Dr
Yuma, AZ 85364-8868
Phone: (928) 317-2518
Mailing address
10240 PARK MEADOWS DR
LONE TREE, CO 80124-5425
Phone: (303) 338-4545 Fax:
Sole Proprietor
No
Updated
Certification Date
Jul 23, 2025

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Identifiers

Identifiers for STEPHEN MAYER

Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.

DescriptionIssuerStateIdentifier
otherKAISER COMMERCIAL NUMBERCO026274
medicaidCO40726355
Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
207RH0003X
- Internal Medicine / Hematology & Oncology (Primary)		 MA 219667

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Additional Information

Education
BOSTON UNIVERSITY SCHOOL OF MEDICINE - Graduated 2001
Accepts Medicare
This provider accepts Medicare-approved amount as payment in full. The Medicare-approved amount is the total the provider can be paid. When a provider accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsureance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices
Affiliations
STEPHEN MAYER is affiliated with the following medical group(s):
  • HOSPITAL
    • ASPEN VALLEY HOSPITAL
      401 CASTLE CREEK RD
      ASPEN, CO 81611
    • GRAND RIVER HOSPITAL DISTRICT
      501 AIRPORT RD
      RIFLE, CO 81650
    • MEMORIAL HOSPITAL, THE
      750 HOSPITAL LOOP
      CRAIG, CO 81625
    • VALLEY VIEW HOSPITAL ASSOCIATION
      1906 BLAKE AVE
      GLENWOOD SPRINGS, CO 81601

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