Active NPI 1225314990 Individual Practitioner Female Practitioner

Mary K Dahilig , APN, FNP-BC

Nurse Practitioner • Chicago, IL

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Mary Dahilig, APN, FNP-BC is a certified Nurse Practitioner practicing in Chicago, IL. With approximately 15 years of clinical experience since graduating from University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb) in 2011, Mary Dahilig delivers high-quality medical care to the local community at 20 S CLARK ST FL 11.

Mary Dahilig is affiliated with Northwestern Medical Faculty Foundation and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include established patient outpatient office visit, new patient outpatient office visit, administration of influenza virus vaccine. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

20 S Clark St Fl 11

Chicago, IL 606031882

Telephone 3129263627

Fax 3123572284

Associated Practice Facility / Clinic

🏢 Kaminska Dermatology Facility NPI 1093377731

Medicare Profile & Education

Medical School

University Of Illinois College Of Med (Chi/peor/rock/chm-Urb)

Graduation Year

2011

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Nurse Practitioner in Chicago, IL

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

15 Yrs +6.1 yrs vs City Avg

City Avg: 8.9 Yrs

State Avg: 10.4 Yrs

Regional Practice Density

961 Specialists

Practicing in Chicago, IL (4929 Statewide)

Telehealth Adoption Rate

19.8% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

42.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Dahilig (15 Years) 15 Yrs

Chicago Specialty Average (8.9 Years) 8.9 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	24	23	$143.32	$81.96
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	21	21	$174.82	$101.19

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	36	35	$139.00	$80.26
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	28	28	$140.07	$96.73
G0008 Administration of influenza virus vaccine	16	16	$34.31	$31.64
87426 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus	16	15	$120.00	$34.62
90694 Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage	15	15	$72.13	$68.17
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	15	13	$99.00	$50.36
87651 Detection test for Strep (Streptococcus, group A)	11	11	$45.73	$34.39

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
87426 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus	36	34	$120.00	$34.82
0004A Fee covid-19 vac 1 res	19	19	$56.99	$41.31
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	17	17	$139.00	$101.05
99202 New patient office or other outpatient visit, typically 20 minutes	17	17	$99.00	$65.73
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	16	16	$99.00	$51.05
G0008 Administration of influenza virus vaccine	12	12	$26.00	$25.52
99213 Established patient office or other outpatient visit, typically 15 minutes	12	11	$139.00	$81.34
90662 Influenza vaccine split virus, preservative free	12	12	$67.25	$65.98
0124A Fee covid-19 vac 13 res	11	11	$56.99	$40.96

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
87426 Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus	89	86	$120.00	$35.33
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	45	45	$39.00	$20.61
99202 New patient office or other outpatient visit, typically 20 minutes	36	36	$99.00	$66.44
G0008 Administration of influenza virus vaccine	26	26	$26.00	$17.98
90662 Influenza vaccine split virus, preservative free	26	26	$48.00	$48.00
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	13	13	$91.31	$50.84
99213 Established patient office or other outpatient visit, typically 15 minutes	13	11	$114.38	$82.62

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
G0008 Administration of influenza virus vaccine	28	28	$26.00	$17.75
90662 Influenza vaccine split virus, preservative free	27	27	$44.00	$44.00
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	11	11	$139.00	$98.43

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	17	$136.50	$97.17
G0008 Administration of influenza virus vaccine	20	20	$26.00	$17.39
90662 Influenza vaccine split virus, preservative free	19	19	$44.00	$43.12
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$137.18	$90.33

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
G0008 Administration of influenza virus vaccine	19	19	$26.00	$21.46
90662 Influenza vaccine split virus, preservative free	18	18	$44.00	$43.12

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
G0008 Administration of influenza virus vaccine	30	30	$26.00	$25.48
90662 Influenza vaccine split virus, preservative free	29	29	$44.00	$43.12
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	15	14	$129.00	$94.08
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	12	12	$129.00	$95.55

Medical Specialties & State Licenses

CMS Verified: 2025-05-06

Nurse Practitioner Primary Specialty

NUCC Taxonomy Code: 363L00000X

State License IL 277003870

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Nurse Practitioner

NUCC Taxonomy Code: 363L00000X

State License IL 209009165

Nurse Practitioner - Family

NUCC Taxonomy Code: 363LF0000X

State License IL 209009165

Definition to come...

Hospital & Practice Group Affiliations

Northwestern Medical Faculty Foundation

20 S Clark, Chicago, IL 606031882

Phone: 3129266146

Northwestern Medical Faculty Foundation

4445 W Irving Park Rd, Chicago, IL 606412808

Northwestern Medical Faculty Foundation

675 N St Clair, Chicago, IL 606115975

Northwestern Medical Faculty Foundation

675 N Saint Clair St, Chicago, IL 606115975

Secondary Practice Locations

5999 New Wilke Rd Ste 200

Rolling Meadows, IL 600084502

Phone: 8476180800

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners

Dr. Allison Donovan , MD

Family Medicine

NPI 1003374141

Doctor of Medicine (M.D.)

Harrison Garcia

Student in an Organized Health Care Education/Training Program

NPI 1003683699

Dr. Rebekah Osgood , MD

Obstetrics & Gynecology

NPI 1013146596

Doctor of Medicine (M.D.)

Dr. Cara Garretson , MD

Dermatology

NPI 1033249677

Doctor of Medicine (M.D.)

Dr. Veronica Johnson , MD

Internal Medicine

NPI 1033536412

Doctor of Medicine (M.D.)

Dr. Sruthi Sathyakumar , MD

Family Medicine - Adult Medicine

NPI 1063090173

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

14 Historical Events

📍

Updated Practice Location May 06, 2025

Registered at 20 S CLARK ST FL 11, CHICAGO, IL 606031882 (Tel: 3129263627)

📍

Updated Business Mailing Address May 06, 2025

Registered at 20 S CLARK ST FL 11, CHICAGO, IL 606031882 (Tel: 3129263627)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 06, 2025

Nurse Practitioner (License #209009165 in IL)

✅

NPI Profile Active November 07, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location November 07, 2017

Registered at 26W212 GENEVA RD, CAROL STREAM, IL 601882240 (Tel: 6305101065)

📍

Updated Business Mailing Address November 07, 2017

Registered at 26W212 GENEVA RD, CAROL STREAM, IL 601882240

👤

Provider Name / Credentials Updated November 07, 2017

Recorded as MARY DAHILIG, APN, FNP-BC

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) November 07, 2017

Nurse Practitioner (License #209009165 in IL)

✅

NPI Profile Active October 26, 2011

NPI status registered as active in NPPES database

📍

Updated Practice Location October 26, 2011

Registered at 11200 LINCOLN HWY, MOKENA, IL 60448 (Tel: 6302322094)

📍

Updated Business Mailing Address October 26, 2011

Registered at 1 CVS DR., WOONSOCKET, RI 028956146

👤

Provider Name / Credentials Updated October 26, 2011

Recorded as MARY DAHILIG, APN, FNP-BC

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) October 26, 2011

Nurse Practitioner (License #209009165 in IL)

🟢

Initial NPI Registration & Enumeration October 26, 2011

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1225314990

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: October 26, 2011

Last Update: May 06, 2025

Sole Proprietor: No

Update or Correct Profile

Mailing Address

20 S Clark St Fl 11

Chicago, IL 606031882

Phone: 3129263627

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.