DR. GRAHAM THOMAS MCMAHON M.D., M.M.SC.
NPI 1275512477
Internal Medicine - Endocrinology, Diabetes & Metabolism in Chicago, IL
NPI Status: Active since January 16, 2006
Contact Information
4025 N SHERIDAN RD
CHICAGO, IL
ZIP 60613
Phone: (773) 388-1600
Fax: (773) 388-1602
- Individual
- Male
- Internal Medicine
- Endocrinology, Diabetes & Metabolism
- Accepts Insurance
- PECOS Enrolled
About GRAHAM MCMAHON
This page provides the complete NPI Profile along with additional information for Graham Mcmahon, an internist established in Chicago, Illinois with a medical specialization in Internal Medicine, focusing in endocrinology, diabetes & metabolism . The healthcare provider is registered in the NPI registry with number 1275512477 assigned on January 2006. The practitioner's primary taxonomy code is 207RE0101X with license number 036.139549 (IL). The provider is registered as an individual and his NPI record was last updated 4 years ago.
- NPI
- 1275512477
- Provider Name
- DR. GRAHAM THOMAS MCMAHON M.D., M.M.SC.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4025 N SHERIDAN RD CHICAGO, IL 60613
- Location Phone
- (773) 388-1600
- Location Fax
- (773) 388-1602
- Mailing Address
- 4025 N SHERIDAN RD CHICAGO, IL 60613
- Mailing Phone
- (773) 388-1600
- Mailing Fax
- (773) 388-1602
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 01-16-2006
- Last Update Date
- 07-23-2021
- Code Navigator
An internist like Graham Mcmahon 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
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 Endocrinology, Diabetes & Metabolism
- Taxonomy Code
- 207RE0101X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 036.139549
- License State
- IL
- Taxonomy Description
- An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 207RE0101X | Allopathic & Osteopathic Physicians | Internal Medicine | 205297 (MA) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Bronze 1 Advanced: Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care + Rx Copay - HMO
- Bronze 4 Advanced: $0 PCP + Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care - HMO
- Bronze 4 Advanced: $0 PCP + Aetna network + $0 MinuteClinic + Adult Dental + Vision - HMO
- Bronze S: Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care - HMO
- Gold 10 Advanced: $0 PCP + Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care - HMO
- Gold 10 Advanced: $0 PCP + Aetna network + $0 MinuteClinic + Adult Dental + Vision - HMO
- Gold 3 Advanced: Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care + Rx Copay - HMO
- Gold 3 Advanced: Aetna network + $0 MinuteClinic + Adult Dental + Vision + Rx Copay - HMO
- Gold S: Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care + Rx Copay - HMO
- Gold S: Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care + Rx Copay - PPO
- Silver 10 Advanced: $0 PCP + Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care - HMO
- Silver 10 Advanced: $0 PCP + Aetna network + $0 MinuteClinic + Adult Dental + Vision - HMO
- Silver 5 Advanced: Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care + Rx Copay - HMO
- Silver 5 Advanced: Aetna network + $0 MinuteClinic + Adult Dental + Vision + Rx Copay - HMO
- Silver S: Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care - HMO
- Silver S: Aetna network + $0 MinuteClinic + $0 CVS Health Virtual Primary Care - PPO
- Complete Gold - EPO
- Complete Gold + Vision + Adult Dental - EPO
- Complete Silver - EPO
- Complete Silver + Vision + Adult Dental - EPO
- Elite Bronze - EPO
- Elite Bronze + Vision + Adult Dental - EPO
- Everyday Bronze - EPO
- Everyday Bronze + Vision + Adult Dental - EPO
- Everyday Gold - EPO
- Everyday Gold + Vision + Adult Dental - EPO
- Premier Silver - EPO
- Premier Silver + Vision + Adult Dental - EPO
- Standard Expanded Bronze - EPO
- Standard Expanded Bronze + Vision + Adult Dental - EPO
- Standard Gold - EPO
- Standard Gold + Vision + Adult Dental - EPO
- Standard Silver - EPO
- Choice Bronze HSA - HMO
- Choice Bronze HSA + Vision + Adult Dental - HMO
- Clear Silver - HMO
- Complete Gold - HMO
- Complete Gold + Vision + Adult Dental - HMO
- Elite Bronze - HMO
- Elite Bronze + Vision + Adult Dental - HMO
- Elite Gold - HMO
- Elite Gold + Vision + Adult Dental - HMO
- Elite Silver - HMO
- Elite Silver + Vision + Adult Dental - HMO
- Everyday Bronze - HMO
- Everyday Bronze + Vision + Adult Dental - HMO
- Everyday Gold - HMO
- Everyday Gold + Vision + Adult Dental - HMO
- Focused Silver - HMO
- Focused Silver + Vision + Adult Dental - HMO
- Standard Expanded Bronze - HMO
- Standard Expanded Bronze + Vision + Adult Dental - HMO
- Standard Gold - HMO
- Clear Gold - EPO
- Clear Gold + Vision + Adult Dental - EPO
- Complete Gold - EPO
- Complete Gold + Vision + Adult Dental - EPO
- Elite Silver - EPO
- Elite Silver + Vision + Adult Dental - EPO
- Everyday Bronze - EPO
- Everyday Bronze + Vision + Adult Dental - EPO
- Focused Silver - EPO
- Focused Silver + Vision + Adult Dental - EPO
- Premier Bronze HSA - EPO
- Premier Bronze HSA + Vision + Adult Dental - EPO
- Standard Expanded Bronze - EPO
- Standard Expanded Bronze + Vision + Adult Dental - EPO
- Standard Gold - EPO
- Standard Gold + Vision + Adult Dental - EPO
- Standard Silver - EPO
- Central Bronze - HMO
- Central Bronze + Vision + Adult Dental - HMO
- Central Gold - HMO
- Central Gold + Vision + Adult Dental - HMO
- Clear Silver - HMO
- Everyday Bronze - HMO
- Everyday Bronze + Vision + Adult Dental - HMO
- Everyday Gold - HMO
- Everyday Gold + Vision + Adult Dental - HMO
- Focused Silver - HMO
- Focused Silver + 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
- Blue Choice Preferred Bronze PPO? 201 - PPO
- Blue Choice Preferred Bronze PPO? 701 - PPO
- Blue Choice Preferred Bronze PPO? Standard - Select Rx Copays - PPO
- Blue Choice Preferred Gold PPO? 204 - PPO
- Blue Choice Preferred Gold PPO? 901 - PPO
- Blue Choice Preferred Gold PPO? Standard - Rx Copays - PPO
- Blue Choice Preferred Security PPO? 200 - PPO
- Blue Choice Preferred Silver PPO? 203 - PPO
- Blue Choice Preferred Silver PPO? 801 - PPO
- Blue Choice Preferred Silver PPO? Standard - Select Rx Copays - PPO
- Gold 1 - HMO
- Gold 1 with Adult Vision Services - HMO
- Gold 8 with Rx Copay - HMO
- Silver 1 - HMO
- Silver 1 with Rx Copay and Adult Vision Services - HMO
- Silver 12 with first 4 free PCP or MH visits - HMO
- Silver 8 - HMO
- UHC Bronze Copay Focus (No Referrals) - HMO
- UHC Bronze Standard (No Referrals) - HMO
- UHC Bronze Value (Rx Copay, No Referrals) - HMO
- UHC Bronze Value+ (Rx Copay, Dental + Vision, No Referrals) - HMO
- UHC Gold Advantage (No Referrals) - HMO
- UHC Gold Advantage+ (Dental + Vision, No Referrals) - HMO
- UHC Gold Copay Focus (No Referrals) - HMO
- UHC Gold Standard (Rx Copay, No Referrals) - HMO
- UHC Silver Advantage (Rx Copay, No Referrals) - HMO
- UHC Silver Advantage+ (Rx Copay, Dental + Vision, No Referrals) - HMO
- UHC Silver Copay Focus (No Referrals) - HMO
- UHC Silver Standard (No Referrals) - HMO
- UHC Silver Standard+ (Dental + Vision, No Referrals) - 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 |
|---|---|---|---|
| 036.139549 | MEDICAID (05) | IL |
Medicare Participation & PECOS Enrollment Status
Graham Mcmahon 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
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
Provider Referred Orders for Durable Medical Equipment, Devices & Supplies
The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.
Durable Medical Equipment
DME-Other DME (DE017N)
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service (HCPCS:K0553)
1 DME suppliers used 12 Medicare Claims 12 Services Paid
Physician Visit Costs
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 60613 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99204
- Average New Patient Price $138.86
- Minimum New Patient Price $60.08
- Maximum New Patient Price $183.39
- Average New Patient Copayment $34.71
- Minimum New Patient Copayment $15.02
- Maximum New Patient Copayment $45.84
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99214
- Average Established Patient Price $105.7
- Minimum Established Patient Price $18.97
- Maximum Established Patient Price $148.12
- Average Established Patient Copayment $26.42
- Minimum Established Patient Copayment $4.74
- Maximum Established Patient Copayment $37.03
* 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.
Reviews for DR. GRAHAM THOMAS MCMAHON M.D., M.M.SC.
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
| Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
| 1 | 2 | 7 | 5 | 5 | 1 | 2 | 4 | 7 | 7 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 2 | 14 | 5 | 10 | 1 | 4 | 4 | 14 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 2 + 1 + 4 + 5 + 1 + 0 + 1 + 4 + 4 + 1 + 4 + 24 = 53 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 60 - 53 = 7 | 7 | ||||||||
The NPI number 1275512477 is valid because the calculated check digit 7 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 20 providers are registered at the same or nearby location.
| NPI | Name / Type | Taxonomy | Address |
|---|---|---|---|
| 1346221744 | DR. JOSHUA THOMAS TITUS PHARM.D. Individual | Pharmacist | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 528-8314 |
| 1316920408 | DR. JILL E DUNMORE PHARMD Individual | Pharmacist | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 528-8314 |
| 1649258914 | MS. LISA JILL RIVITZ Individual | Social Worker (Clinical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-8886 |
| 1306816400 | DR. EDWARD J FAJARDO PSYD Individual | Psychologist (Clinical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-8909 |
| 1639185150 | DAVID EBNER BLATT M.D. Individual | Internal Medicine | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-1600 |
| 1043370653 | ARMAND R CERBONE PH.D. Individual | Psychologist | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-1600 |
| 1326163908 | JILLIAN MARIE DRONFIELD Individual | Social Worker (Clinical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-8991 |
| 1518173244 | DR. KELLY MICHELLE DUCHENY PSY.D. Individual | Psychologist (Clinical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-8904 |
| 1083890438 | DR. MICHELLE EMERICK PSY.D. Individual | Psychologist (Clinical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-8903 |
| 1306115522 | ANDREW HALBUR Individual | Pharmacist | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 528-8314 |
| 1184972473 | MS. JESSICA FAYE HORWITZ FNP Individual | Nurse Practitioner (Family) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (312) 731-5981 |
| 1417231242 | SARAH LANDOLFI LCSW Individual | Social Worker (Clinical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-8935 |
| 1528432994 | KIRA ELIZABETH WEIDNER PSYD Individual | Psychologist | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-1600 |
| 1417238957 | BRIAN DANIEL FLORES PSYD Individual | Psychologist (Clinical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (708) 388-1600 |
| 1336531953 | KATHLEEN JENSEN LCSW Individual | Social Worker (Clinical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-1600 |
| 1235154097 | KRISTIN KEGLOVITZ BAKER P.A.-C Individual | Physician Assistant (Medical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-8870 |
| 1780142919 | MS. KRISTA LEIGH YANK NP Individual | Nurse Practitioner (Women's Health) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-1600 |
| 1528607967 | REBECCA M GRUNDY PA-C Individual | Physician Assistant | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-1600 |
| 1588283865 | COLTON W SHERELL CPHT Individual | Pharmacy Technician | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 528-8314 |
| 1215917109 | HOWARD BROWN HEALTH CENTER Organization | Psychologist (Clinical) | 4025 N SHERIDAN RD CHICAGO, IL 60613 (773) 388-8909 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1275512477, enumerated in the NPI registry as an "individual" on January 16, 2006
The provider is located at 4025 N Sheridan Rd Chicago, Il 60613 and the phone number is (773) 388-1600
The provider's speciality is Internal Medicine with taxonomy code 207RE0101X with a focus in Endocrinology, Diabetes & Metabolism
The provider might be accepting Accepts: Aetna CVS Health, Ambetter from Home State Health,. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.
Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary 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.
Medicare beneficiaries should expect a typical cost of $138.86 with an average copayment of $34.71 for new patient appointments. Established patients should expect a typical charge of $105.7 and an average copayment of 26.42. Please review your insurance plan or contact the provider directly to determine your specific costs.
This NPI record was last updated on January 16, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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