JOAN DAHMER M.D.
NPI 1417954785
Internal Medicine - Hematology & Oncology in Peoria, AZ

NPI Status: Active since July 01, 2005

Contact Information

15000 N 83RD AVE UNIT 300
PEORIA, AZ
ZIP 85381
Phone: (623) 238-7490
Fax: (480) 882-5019

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  • Individual
  • Female
  • Years of Experience 44
  • Internal Medicine
  • Hematology & Oncology
  • Accepts Insurance
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About JOAN DAHMER

This page provides the complete NPI Profile along with additional information for Joan Dahmer, an internist established in Peoria, Arizona with a medical specialization in Internal Medicine, focusing in hematology & oncology and more than 44 years of experience. The healthcare provider is registered in the NPI registry with number 1417954785 assigned on July 2005. The practitioner's primary taxonomy code is 207RH0003X with license number 29673 (AZ). The provider is registered as an individual and her NPI record was last updated February 2026.

NPI
1417954785
Provider Name
JOAN DAHMER M.D.
Gender
Female
Entity Type
Individual
Location Address
15000 N 83RD AVE UNIT 300 PEORIA, AZ 85381
Location Phone
(623) 238-7490
Location Fax
(480) 882-5019
Mailing Address
15000 N 83RD AVE UNIT 300 PEORIA, AZ 85381
Mailing Phone
(623) 238-7490
Mailing Fax
(480) 882-5019
Medical School Name
OTHER
Graduation Year
1982
Is Sole Proprietor?
No
Enumeration Date
07-01-2005
Last Update Date
02-25-2026
Code Navigator

An internist like Joan Dahmer is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

Secondary Locations

  • 14674 W Mountain View Blvd Ste 105
    Surprise, AZ 85374
    (623) 238-7410

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Internal Medicine Hematology & Oncology

Taxonomy Code
207RH0003X
Type
Allopathic & Osteopathic Physicians
License No.
29673
License State
AZ
Taxonomy Description
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.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

  • Choice Bronze HSA - HMO
  • Choice Bronze HSA + Vision + Adult Dental - HMO
  • Complete Gold - HMO
  • Complete Gold + Vision + Adult Dental - HMO
  • Complete Silver - HMO
  • Complete Silver + Vision + Adult Dental - HMO
  • Elite Gold - HMO
  • Elite Gold + Vision + Adult Dental - HMO
  • Everyday Bronze - HMO
  • Everyday Bronze + Vision + Adult Dental - HMO
  • Standard Expanded Bronze - HMO
  • Standard Expanded Bronze + Vision + Adult Dental - HMO
  • Standard Gold - HMO
  • Standard Gold + Vision + Adult Dental - HMO
  • Standard Silver - HMO
  • Standard Silver + Vision + Adult Dental - HMO
  • AZ Blue ACA StandardHealth Silver with Health Choice - HMO
  • AZ Blue AdvanceHealth Bronze Focus (4 Free PCP Visits) - HMO
  • AZ Blue AdvanceHealth Gold Focus (4 Free PCP Visits) - HMO
  • AZ Blue AdvanceHealth Silver Focus (4 Free PCP Visits) - HMO
  • AZ Blue EverydayHealth Gold Focus (1 Free PCP Visit) - HMO
  • AZ Blue EverydayHealth Prosano Gold ($0 Prosano Health Visits) - HMO
  • AZ Blue EverydayHealth Prosano Silver ($0 Prosano Health Visits) - HMO
  • AZ Blue EverydayHealth Silver Focus (1 Free PCP Visit) - HMO
  • AZ Blue Portfolio Bronze HSA Focus - HMO
  • AZ Blue StandardHealth Bronze Focus - HMO
  • AZ Blue StandardHealth Gold Focus - HMO
  • AZ Blue StandardHealth Silver Focus - HMO
  • Bronze Classic Standard - HMO
  • Bronze Elite + PCP Saver Plus - HMO
  • Bronze Simple - HMO
  • Bronze Simple Breathe Easy with Enhanced COPD Benefits - HMO
  • Bronze Simple Chronic Care CKM - HMO
  • Buena Salud Bronce Simple Para Diabetes - HMO
  • Gold Classic - HMO
  • Gold Classic Standard - HMO
  • Gold Simple - HMO
  • Gold Simple Diabetes - HMO
  • Silver Classic Standard - HMO
  • Silver Elite Saver Plus - HMO
  • Silver Simple Chronic Care CKM - HMO
  • Silver Simple Diabetes - HMO
  • Silver Simple PCP Saver - HMO
  • Silver Simple Specialist Saver with COPD - HMO
  • Silver Simple Women's Health with Menopause Benefits - HMO

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
631102MEDICAID (05)AZ 

Medicare Participation & PECOS Enrollment Status

Joan Dahmer is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Joan Dahmer is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 5890766992

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20040803000763

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 195 times for 167 patients

Established patient office or other outpatient visit, 30-39 minutes

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.

This service was performed 671 times for 277 patients

Established patient office or other outpatient visit, 40-54 minutes

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.

This service was performed 89 times for 49 patients

Follow-up hospital inpatient care per day, typically 25 minutes

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

This service was performed 75 times for 39 patients

Follow-up hospital inpatient care per day, typically 35 minutes

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

This service was performed 89 times for 42 patients

Initial hospital inpatient care per day, typically 70 minutes

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

This service was performed 34 times for 34 patients

New patient office or other outpatient visit, 45-59 minutes

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

This service was performed 86 times for 86 patients

New patient office or other outpatient visit, 60-74 minutes

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

This service was performed 27 times for 27 patients

Oncology care model (ocm) monthly enhanced oncology services (meos) payment for ocm enhanced services. g9678 payments may only be made to ocm practitioners for ocm beneficiaries for the furnishment of enhanced services as defined in the ocm participation a

The Oncology Care Model (OCM) Monthly Enhanced Oncology Services (MEOS) payment, denoted by G9678, is a compensation method for OCM practitioners. These payments are specifically for providing additional, or "enhanced", services to OCM beneficiaries, as outlined in the OCM participation agreement.

This service was performed 60 times for 24 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $42.15 for a new patient copayment and $24.5 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 85381 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99205

  • Average New Patient Price $168.6
  • Minimum New Patient Price $55.44
  • Maximum New Patient Price $168.6
  • Average New Patient Copayment $42.15
  • Minimum New Patient Copayment $13.86
  • Maximum New Patient Copayment $42.15

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $98
  • Minimum Established Patient Price $17.72
  • Maximum Established Patient Price $137.41
  • Average Established Patient Copayment $24.5
  • Minimum Established Patient Copayment $4.43
  • Maximum Established Patient Copayment $34.35

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1417954785, we treat the final digit (5) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 75. The final step is to find the difference between that total and the next multiple of ten (80 - 75 = 5).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
4
Unchanged
Pos 3
1
Doubled → 2
Pos 4
7
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
5
Unchanged
Pos 7
4
Doubled → 8
Pos 8
7
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
5
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 1 → 2 9 → 18 → 9 4 → 8 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 4 + 2 + 7 + 1 + 8 + 5 + 8 + 7 + 1 + 6 + 24 = 75

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 75 is 80. The difference is the calculated check digit.

80 - 75 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1417954785.

Other Providers at the Same Location


The following 7 providers are registered at the same or a nearby location.

Internal Medicine (Hematology & Oncology)
15000 N 83RD AVE UNIT 300
PEORIA, AZ 85381
Obstetrics & Gynecology (Gynecologic Oncology)
15000 N 83RD AVE UNIT 300
PEORIA, AZ 85381
Internal Medicine (Medical Oncology)
15000 N 83RD AVE UNIT 300
PEORIA, AZ 85381
Specialist
15000 N 83RD AVE UNIT 300
PEORIA, AZ 85381
Internal Medicine (Hematology & Oncology)
15000 N 83RD AVE UNIT 300
PEORIA, AZ 85381
Obstetrics & Gynecology (Gynecologic Oncology)
15000 N 83RD AVE UNIT 300
PEORIA, AZ 85381
Internal Medicine (Hematology & Oncology)
15000 N 83RD AVE UNIT 300
PEORIA, AZ 85381

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1417954785, enumerated as an "individual" on July 01, 2005.

The provider is located at 15000 N 83RD AVE UNIT 300 PEORIA, AZ 85381 and the phone number is (623) 238-7490.

Internal Medicine with taxonomy code 207RH0003X and a focus in Hematology & Oncology.

The provider might be accepting Accepts: Ambetter from Arizona Complete Health, Blue Cross. Please consult your insurance carrier or call the provider to verify.