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Dr. Allison Hamilton , MD

Dermatology โ€ข Chicago, IL

Active NPI 1720601248 Individual Practitioner Female Practitioner Accepts Medicare assignment
Practice location in NPPES

4445 W Irving Park Rd
Chicago, IL 606412808

Call 8443446663 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

4445 W Irving Park Rd

Chicago, IL 606412808

Telephone 8443446663
Fax 3129210382
Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: Northwestern Medical Faculty Foundation. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Medical School

Southern Illinois University School Of Medicine

Graduation Year

2020

Medicare patients

60 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider, 2024.

Medicare-allowed amount

About $6,857 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Paid by Medicare

About $5,271 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

30-day fills

395 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$172,236 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers โ€“ by Provider and Drug, 2024.

Open Payments general payments, program year 2025

All general payments: $52.49 across 3 records.

By nature of payment

  • Food and Beverage: $52.49 across 3 records.

Reporting-company totals

  • Amgen Inc.: $52.49 across 3 records.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

6 years (graduated 2020)

CMS Doctors and Clinicians data list 2020 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2020

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, โ€œDoes your provider accept Medicare as full payment?โ€

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Hamilton has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Hamilton as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Chicago and Illinois

Billing and prescribing volume is not a quality rating.

Medicare Part B services

Fewer Medicare Part B services than 90% of clinicians listed under Dermatology in Chicago, IL (2024, 113 clinicians with data). Median for this group: 734. Middle half: 298 to 1,752.

Fewer Medicare Part B services than 95% of clinicians listed under Dermatology in Illinois (2024, 405 clinicians with data). Median for this group: 2,033. Middle half: 899 to 4,119.

Medicare-allowed amount

A lower Medicare-allowed amount than 90% of clinicians listed under Dermatology in Chicago, IL (2024, 113 clinicians with data). Median for this group: $55,579. Middle half: $21,156 to $115,126.

A lower Medicare-allowed amount than 95% of clinicians listed under Dermatology in Illinois (2024, 405 clinicians with data). Median for this group: $141,868. Middle half: $64,155 to $281,967.

Paid by Medicare

A lower Medicare payment amount than 90% of clinicians listed under Dermatology in Chicago, IL (2024, 113 clinicians with data). Median for this group: $38,442. Middle half: $14,571 to $82,347.

A lower Medicare payment amount than 95% of clinicians listed under Dermatology in Illinois (2024, 405 clinicians with data). Median for this group: $99,602. Middle half: $44,437 to $204,261.

Medicare Part D prescriptions

More Part D prescriptions than 60% of clinicians listed under Dermatology in Chicago, IL (2024, 146 clinicians with data). Median for this group: 223. Middle half: 94 to 508.

Close to the middle for clinicians listed under Dermatology in Illinois (2024, 468 clinicians with data). Median for this group: 471. Middle half: 165 to 904.

Part D drug cost

A higher Part D drug cost than 70% of clinicians listed under Dermatology in Chicago, IL (2024, 146 clinicians with data). Median for this group: $50,146. Middle half: $2,705 to $189,548.

A higher Part D drug cost than 65% of clinicians listed under Dermatology in Illinois (2024, 468 clinicians with data). Median for this group: $69,576. Middle half: $5,709 to $275,598.

233 active clinicians are listed under Dermatology with a practice address in Chicago, IL (647 in Illinois).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Chicago

10.3% of these 233 clinicians have the CMS telehealth indicator.

54.9% of these 233 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo ยท Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments ยท Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 โ€“ December 31, 2025): fewer than 11 records totaling $52.49.

Manufacturer Payment Nature Product Type Amount ($)
Amgen Inc.
Food and Beverage
In-kind items and services
OTEZLA General $18.08
Amgen Inc.
Food and Beverage
In-kind items and services
Otezla General $17.84
Amgen Inc.
Food and Beverage
In-kind items and services
OTEZLA General $16.57

Source: CMS Open Payments, program year 2025, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B ยท Data Year 2024

CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ€“ by Provider and Service data, 2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
23 23 $505.00 $174.67
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
18 18 $330.00 $111.89
99202 New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more
11 11 $225.00 $75.02

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D ยท Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Ketoconazole Ketoconazole 110 2,765 $1,776.87 46
Triamcinolone Acetonide Triamcinolone Acetonide 60 1,752 $479.11 43
Hydrocortisone Hydrocortisone 35 903 $222.99 21
Clobetasol Propionate Clobetasol Propionate 30 805 $2,957.06 19
Clindamycin Phosphate Clindamycin Phosphate 27 770 $734.46 11
Doxycycline Monohydrate Doxycycline Monohydrate 24 431 $824.89 โ€”
Betamethasone Dipropionate Betamethasone Dipropionate 15 372 $554.64 โ€”
Dupixent Pen Dupilumab 15 406 $56,303.19 โ€”
Metronidazole Metronidazole 13 400 $627.28 โ€”
Taltz Autoinjector Ixekizumab 13 364 $106,858.74 โ€”
Tretinoin Tretinoin 11 720 $896.54 โ€”

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2024-09-09
Dermatology Primary Specialty

NUCC Taxonomy Code: 207N00000X

License # reported to NPPES IL 036171010

A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Illinois Department of Financial and Professional Regulation.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - DERMATOLOGY

Medicare Enrollment ID

I20240919001198

Enrollment State Jurisdiction

IL

PECOS Control ID

8628491263

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Northwestern Medical Faculty Foundation

4445 W Irving Park Rd, Chicago, IL 606412808

Phone: 8443446663

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

3 listed
NPI 1538375530

Doctor of Medicine (M.D.)

Daniella Brutman

Family Medicine

NPI 1730611898
Maura Chaps , MS OT

Occupational Therapist

NPI 1225699499

MSOT

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

16 Historical Events
๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) August 21, 2024

Dermatology (license number reported to NPPES: IL 036171010)

๐Ÿ“
Updated Practice Location June 21, 2024

Registered at 4445 W IRVING PARK RD, CHICAGO, IL 606412808 (Tel: 8443446663)

๐Ÿ“
Updated Business Mailing Address June 21, 2024

Registered at 4445 W IRVING PARK RD, CHICAGO, IL 606412808 (Tel: 3098382206)

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) June 21, 2024

Dermatology (license number reported to NPPES: IL 125076499)

๐Ÿ‘ค
Provider Name / Credentials Updated May 12, 2021

Recorded as ALLISON HAMILTON, MD

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) May 12, 2021

Internal Medicine (license number reported to NPPES: IL 125076499)

๐Ÿ‘ค
Provider Name / Credentials Updated July 23, 2020

Recorded as ALLISON FREY, MD

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 23, 2020

Dermatology (license number reported to NPPES: IL 125076499)

๐Ÿ‘ค
Provider Name / Credentials Updated July 11, 2020

Recorded as ALLISON HAMILTON, MD

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 11, 2020

Internal Medicine (license number reported to NPPES: IL 125076499)

โœ…
NPI Profile Active June 03, 2020

NPI status registered as active in NPPES database

๐Ÿ“
Practice Location (Initial Record) June 03, 2020

Registered at 751 N RUTLEDGE ST STE 2300, SPRINGFIELD, IL 627024968 (Tel: 2175458000)

๐Ÿ“
Business Mailing Address (Initial Record) June 03, 2020

Registered at PO BOX 19644, SPRINGFIELD, IL 627949644 (Tel: 3098382206)

๐Ÿ‘ค
Provider Name / Credentials (Initial Record) June 03, 2020

Recorded as ALLISON FREY, MD

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) June 03, 2020

Dermatology (license number reported to NPPES: IL 125076499)

๐ŸŸข
Initial NPI Registration & Enumeration May 19, 2020

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1720601248
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: May 19, 2020
Last Update: September 09, 2024
Sole Proprietor: No

Other Dermatology Specialists in Chicago

All Dermatology Specialists in Chicago

Mailing Address

4445 W Irving Park Rd

Chicago, IL 606412808

Phone: 3098382206

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.