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DR. STEPHEN ARMOND MAYER M.D.
NPI 1982678975
Internal Medicine - Hematology & Oncology in Sierra Vista, AZ

Active since February 15, 2006PECOS EnrolledAccepts Medicare Assignment
87.96/100
CMS Quality Rating
5151 E HIGHWAY 90, SIERRA VISTA, AZ 85635(520) 803-6644(520) 459-3193 Get Directions Write a Review

NPPES record last updated: July 23, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Stephen Armond Mayer M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. STEPHEN ARMOND MAYER M.D. (NPI 1982678975) is an individual hematology & oncology provider in Sierra Vista, Arizona, licensed in Colorado (0055236) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Yuma, and is a graduate of Boston University School Of Medicine (2001).

NPPES Registry Identity

NPI1982678975
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDR. STEPHEN ARMOND MAYERCredential: M.D.
Location Address5151 E HIGHWAY 90Sierra Vista, AZ 85635-2436
Mailing Address10240 Park Meadows DrLone Tree, CO 80124-5425 · (303) 338-4545
Phone(520) 803-6644
Fax(520) 459-3193
Sole ProprietorNo
Medical School CMSBoston University School Of MedicineGraduated 2001
Enumeration DateFebruary 15, 2006
Last NPPES UpdateJuly 23, 2025
NPPES CertifiedJuly 23, 2025
✔ NPI 1982678975 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses✔ Licensed in CO · 0055236✔ Licensed in MA · 219667✔ Licensed in AZ · 73625
Definition
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.
5151 E HIGHWAY 90, Sierra Vista, AZ 85635
Open in Google Maps ↗

Secondary Practice Location 1

Location 12375 S Ridgeview DrYuma, AZ 85364-8868 · Phone (928) 317-2518

Other Identifiers 2

Medicaid40726355CO
Other026274CO · Kaiser Commercial Number

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter Health, Blue Cross Blue Shield of Arizona and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Stephen Armond Mayer M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9335151489
PECOS Enrollment IDI20240618000225
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Stephen Mayer reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cochise Oncology LLC
0.1 mi
Radiation Oncology
5151 E HIGHWAY 90
Sierra Vista, AZ 85635
  • Reassigned Medicare billing, Arizona enrollment
  • 10 clinicians in this Medicare group
NPI 1013954858 (520) 803-6644
Yuma Regional Medical Center
269 mi
General Acute Care Hospital
2400 S AVE A
Yuma, AZ 85364
  • Reassigned Medicare billing, Arizona enrollment
  • 557 clinicians in this Medicare group
NPI 1194706655 (928) 344-2000
Valley View Hospital Association
560 mi
Neurological Surgery
401 CASTLE CREEK RD
Aspen, CO 81611
  • Reassigned Medicare billing, Colorado enrollment
  • Also billed through NPI 1215539374 (Colorado), NPI 1114654795 (Colorado)
  • 163 clinicians in this Medicare group
NPI 1649814450 (970) 384-8060

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, dexamethasone sodium phosphate, 1 mg J1100
Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.
450 services11 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
188 services99 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
61 services50 patients
Administration of chemotherapy into vein, 1 hour or less 96413
Chemotherapy is a treatment that uses drugs to destroy cancer cells. When administered into a vein, it's often through an IV. This procedure usually lasts 1 hour or less. You may feel a slight pinch as the needle is inserted, but it's generally painless.
60 services17 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
53 services42 patients
Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less 96367
This procedure involves injecting fluids or medication directly into your vein. It's used for treatment, prevention, or diagnosis. An additional sequential infusion may be given within an hour if needed. This helps to ensure the medicine is distributed effectively in your body.
35 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85635 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$168.60 typical visit price
range $55.44 – $168.60
Typical copayment $42.15 (range $13.86 – $42.15)
Most-billed visit code 99205
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

87.96/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality72.43
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

COCHISE ONCOLOGY LLC
Radiology (Radiation Oncology)
5151 E HIGHWAY 90
SIERRA VISTA, AZ 85635
Cochise County (520) 803-6644
COCHISE MEDICAL ONCOLOGY, LLC
Specialist
5151 E HIGHWAY 90
SIERRA VISTA, AZ 85635
Cochise County (520) 803-6644
SRIMAN SWARUP MD
Internal Medicine (Hematology & Oncology)
5151 E HIGHWAY 90
SIERRA VISTA, AZ 85635
Cochise County (520) 803-6644
RAMESH VEDULA MD
Radiology (Radiation Oncology)
5151 E HIGHWAY 90
SIERRA VISTA, AZ 85635
Cochise County (520) 803-6644

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Stephen Mayer's NPI number?

The NPI number for Stephen Mayer is 1982678975. It was assigned to this individual provider in the NPPES registry on February 15, 2006.

Where is Stephen Mayer located?

Stephen Mayer practices at 5151 E Highway 90, Sierra Vista, AZ 85635. The listed phone number is (520) 803-6644.

What is Stephen Mayer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Stephen Mayer enrolled in Medicare?

Yes. Stephen Mayer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Stephen Mayer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Mayer reassigns Medicare benefits to 3 organizations: Cochise Oncology LLC (Sierra Vista, AZ), Yuma Regional Medical Center (Yuma, AZ) and Valley View Hospital Association (Aspen, CO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Stephen Mayer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Stephen Mayer accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona and Cigna HealthCare of Arizona, Inc list Stephen Mayer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Stephen Mayer was last updated on July 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.