Active NPI 1215973599 Individual Practitioner Female Practitioner

Dr. Kellyn Marks , MD

Internal Medicine • Chicago, IL

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. Kellyn Marks, MD is a certified Internal Medicine practicing in Chicago, IL. With approximately 33 years of clinical experience since completing medical education in 1993, Dr. Marks delivers high-quality medical care to the local community at 201 E HURON ST.

Dr. Marks 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, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

201 E Huron St
12th Fl Suite 105

Chicago, IL 606113197

Telephone 3129265111

Associated Practice Facility / Clinic

🏢 Edward J. Olinger, M.d., S.c. Facility NPI 1558346890

Medicare Profile & Education

Medical School

Other

Graduation Year

1993

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Chicago, IL

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

33 Yrs +11.2 yrs vs City Avg

City Avg: 21.8 Yrs

State Avg: 28.9 Yrs

Regional Practice Density

2969 Specialists

Practicing in Chicago, IL (7544 Statewide)

Telehealth Adoption Rate

12.8% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

55.8% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Marks (33 Years) 33 Yrs

Chicago Specialty Average (21.8 Years) 21.8 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
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	413	282	$323.00	$135.62
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	232	232	$373.00	$138.87
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	187	129	$88.00	$17.41
99213 Established patient office or other outpatient visit, typically 15 minutes	132	102	$219.00	$95.63
G0008 Administration of influenza virus vaccine	54	54	$57.00	$33.70
90662 Influenza vaccine split virus, preservative free	53	53	$110.00	$81.45
90480 Admn sarscov2 vacc 1 dose	53	49	$88.00	$44.94
91320 Sarscv2 vac 30mcg trs-suc im	53	49	$202.40	$140.40
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	38	31	$434.00	$192.06
83036 Hemoglobin A1C level	30	22	$69.00	$9.52
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	24	24	$452.00	$176.82
G0009 Administration of pneumococcal vaccine	21	21	$57.00	$33.70
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	21	21	$397.00	$288.14
36415 Insertion of needle into vein for collection of blood sample	20	18	$20.00	$8.65
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	15	15	$562.00	$176.69
93000 Routine ekg using at least 12 leads including interpretation and report	13	13	$140.00	$15.41

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	385	274	$323.00	$134.70
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	249	249	$373.00	$136.97
99213 Established patient office or other outpatient visit, typically 15 minutes	167	118	$219.00	$95.63
G0008 Administration of influenza virus vaccine	64	64	$57.00	$32.32
90662 Influenza vaccine split virus, preservative free	62	62	$110.00	$71.82
0124A Fee covid-19 vac 13 res	52	52	$70.00	$43.09
91312 Coronavirus vaccine 13	52	52	$0.01	$0.01
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	48	41	$434.00	$190.19
G0009 Administration of pneumococcal vaccine	31	31	$57.00	$32.32
83036 Hemoglobin A1C level	30	23	$69.00	$9.52
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	29	29	$397.00	$281.89
90480 Admn sarscov2 vacc 1 dose	22	22	$88.00	$43.09
91320 Sarscv2 vac 30mcg trs-suc im	22	22	$197.00	$128.48
99442 Telephone medical discussion with physician, 11-20 minutes	14	14	$175.00	$96.04
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	12	12	$452.00	$176.19
36415 Insertion of needle into vein for collection of blood sample	11	11	$20.00	$8.40

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	407	274	$323.00	$137.04
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	229	229	$373.00	$139.88
99213 Established patient office or other outpatient visit, typically 15 minutes	195	148	$219.00	$97.01
36415 Insertion of needle into vein for collection of blood sample	109	101	$20.00	$2.95
G0008 Administration of influenza virus vaccine	93	93	$57.00	$31.05
90662 Influenza vaccine split virus, preservative free	89	89	$110.00	$68.43
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	56	45	$434.00	$194.61
83036 Hemoglobin A1C level	42	28	$69.00	$9.59
0124A Fee covid-19 vac 13 res	39	39	$70.00	$40.83
91305 Sarscov2 vac 30 mcg trs-sucr	34	34	$0.01	$0.01
0054A Intramuscular administration of single severe acute respiratory syndrome coronavirus 2 (covid-19) vaccine, mrna-lnp, spike protein, preservative free, 30 mcg/0.3ml dosage, tris-sucrose formulation; booster dose	32	32	$70.00	$41.25
91312 Coronavirus vaccine 13	31	31	$0.01	$0.01
93000 Routine ekg using at least 12 leads including interpretation and report	22	22	$140.00	$15.60
G0009 Administration of pneumococcal vaccine	21	21	$57.00	$31.21
99442 Telephone medical discussion with physician, 11-20 minutes	17	17	$175.00	$97.09
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	14	14	$562.00	$179.93
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	12	12	$397.00	$278.05

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	434	289	$323.00	$138.92
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	213	213	$373.00	$142.37
99213 Established patient office or other outpatient visit, typically 15 minutes	183	139	$219.00	$98.02
36415 Insertion of needle into vein for collection of blood sample	181	153	$20.00	$3.00
91300 Sarscov2 vac 30mcg/0.3ml im	89	67	$0.01	$0.01
G0008 Administration of influenza virus vaccine	82	82	$57.00	$17.93
90662 Influenza vaccine split virus, preservative free	78	78	$108.85	$65.15
83036 Hemoglobin A1C level	63	40	$69.00	$9.71
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	40	37	$434.00	$195.54
0001A Intramuscular administration of single severe acute respiratory syndrome coronavirus 2 (covid-19) vaccine, mrna-lnp, spike protein, preservative free, 30 mcg/0.3ml dosage, diluent reconstituted; first dose	36	36	$70.00	$42.01
0003A Adm sarscov2 30mcg/0.3ml 3rd	33	33	$70.00	$42.01
0002A Intramuscular administration of single severe acute respiratory syndrome coronavirus 2 (covid-19) vaccine, mrna-lnp, spike protein, preservative free, 30 mcg/0.3ml dosage, diluent reconstituted; second dose	25	25	$70.00	$42.01
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	24	24	$562.00	$179.67
G0009 Administration of pneumococcal vaccine	24	24	$57.00	$17.91
93000 Routine ekg using at least 12 leads including interpretation and report	22	21	$140.00	$15.78
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	18	18	$452.00	$180.04
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	14	14	$177.86	$124.63

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	350	242	$323.00	$117.58
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	185	185	$373.00	$124.60
99213 Established patient office or other outpatient visit, typically 15 minutes	149	125	$219.00	$81.24
G0008 Administration of influenza virus vaccine	92	89	$57.00	$17.65
90662 Influenza vaccine split virus, preservative free	87	84	$65.00	$60.49
36415 Insertion of needle into vein for collection of blood sample	75	68	$20.00	$2.95
99443 Telephone medical discussion with physician, 21-30 minutes	63	57	$250.00	$116.99
99442 Telephone medical discussion with physician, 11-20 minutes	48	41	$175.00	$79.66
83036 Hemoglobin A1C level	38	27	$69.00	$9.68
G0009 Administration of pneumococcal vaccine	30	30	$57.00	$17.61
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	28	28	$165.00	$118.78
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	18	18	$452.00	$178.68
93000 Routine ekg using at least 12 leads including interpretation and report	16	15	$140.00	$18.66
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	15	15	$562.00	$183.31

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	405	246	$323.00	$115.45
36415 Insertion of needle into vein for collection of blood sample	276	219	$20.00	$2.94
99213 Established patient office or other outpatient visit, typically 15 minutes	267	197	$219.00	$79.15
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	192	192	$373.00	$123.83
83036 Hemoglobin A1C level	99	54	$69.00	$10.57
G0008 Administration of influenza virus vaccine	79	79	$57.00	$17.33
90662 Influenza vaccine split virus, preservative free	71	71	$63.03	$53.83
G0009 Administration of pneumococcal vaccine	45	45	$57.00	$17.33
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	23	23	$165.00	$109.17
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	23	23	$562.00	$182.93
90670 Pneumococcal vaccine for injection into muscle	22	22	$343.00	$208.75
93000 Routine ekg using at least 12 leads including interpretation and report	16	16	$140.00	$18.21
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	16	16	$452.00	$177.03

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	347	241	$219.00	$76.98
36415 Insertion of needle into vein for collection of blood sample	326	242	$20.64	$2.94
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	281	163	$323.00	$112.64
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	162	162	$373.00	$122.51
G0008 Administration of influenza virus vaccine	106	105	$57.00	$21.31
90662 Influenza vaccine split virus, preservative free	97	96	$45.00	$44.10
G0009 Administration of pneumococcal vaccine	46	46	$57.00	$21.31
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	44	44	$562.00	$180.46
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	37	37	$132.00	$46.60
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	27	27	$165.00	$105.59
93000 Routine ekg using at least 12 leads including interpretation and report	22	22	$140.00	$18.11
90670 Pneumococcal vaccine for injection into muscle	19	19	$343.00	$195.86
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	17	17	$452.00	$173.61

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	290	204	$219.00	$77.05
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	254	158	$323.00	$112.82
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	117	117	$373.00	$121.54
G0008 Administration of influenza virus vaccine	101	98	$57.00	$26.42
90662 Influenza vaccine split virus, preservative free	92	90	$45.00	$43.93
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	67	67	$132.00	$46.05
G0009 Administration of pneumococcal vaccine	65	65	$57.00	$26.42
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	62	62	$562.00	$179.24
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month	60	11	$144.00	$44.38
90670 Pneumococcal vaccine for injection into muscle	41	41	$343.00	$185.19
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	25	25	$165.00	$95.13
93000 Routine ekg using at least 12 leads including interpretation and report	21	20	$140.00	$18.09
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	18	18	$452.00	$174.15

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Hospital & Practice Group Affiliations

Northwestern Medical Faculty Foundation

660 N Westmoreland Rd, Lake Forest, IL 600451673

Phone: 3129266146

Northwestern Medical Faculty Foundation

675 N St Clair, Chicago, IL 606115975

Northwestern Medical Faculty Foundation

1333 W Belmont Ave, Chicago, IL 606575785

Northwestern Medical Faculty Foundation

675 N Saint Clair St, Chicago, IL 606115975

Northwestern Medical Faculty Foundation

4732 N Lincoln Ave, Chicago, IL 606258561

Phone: 8474752273

Northwestern Medical Faculty Foundation

350 S Waukegan Rd, Deerfield, IL 600155239

Phone: 3129266146

Northwestern Medical Faculty Foundation

150 E Huron St, Chicago, IL 606112948

Phone: 3129263627

Northwestern Medical Faculty Foundation

676 N Saint Clair St, Chicago, IL 606113133

Phone: 3126944101

Northwestern Medical Faculty Foundation

4445 W Irving Park Rd, Chicago, IL 606412808

Northwestern Medical Faculty Foundation

2701 Patriot Blvd, Glenview, IL 600268039

Phone: 3129266146

Northwestern Medical Faculty Foundation

4732 N Lincoln Ave, Chicago, IL 606258561

Phone: 3129266000

Northwestern Medical Faculty Foundation

350 S Waukegan, Deerfield, IL 600155239

Phone: 3129263107

Northwestern Medical Faculty Foundation

2701 Patriot Blvd, Glenview, IL 600268039

Phone: 8479989910

Practice Associates & Co-Workers

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

6 Associated Practitioners

Dr. Christine Orders , MD

Internal Medicine

NPI 1194751461

Doctor of Medicine (M.D.)

Dr. Danielle Pierro , MD

Internal Medicine

NPI 1417981812

Doctor of Medicine (M.D.)

Dr. Catherine Yi , MD

Internal Medicine

NPI 1437184082

Doctor of Medicine (M.D.)

Dr. Sanjay Patel , MD

Internal Medicine

NPI 1518991900

Doctor of Medicine (M.D.)

Dr. Naresh Thakur , MD

Internal Medicine

NPI 1578581633

Doctor of Medicine (M.D.)

Dr. Debalina De , MD

Internal Medicine

NPI 1588015184

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location July 08, 2007

Registered at 201 E HURON ST, 12TH FL SUITE 105, CHICAGO, IL 606113197 (Tel: 3129265111)

📍

Updated Business Mailing Address July 08, 2007

Registered at 201 E HURON ST, 12TH FL SUITE 105, CHICAGO, IL 606113197

👤

Provider Name / Credentials Updated July 08, 2007

Recorded as KELLYN MARKS, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Internal Medicine

🟢

Initial NPI Registration & Enumeration June 22, 2006

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: 1215973599

Entity Type:

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

Enumeration Date: June 22, 2006

Last Update: July 08, 2007

Sole Proprietor: No

Update or Correct Profile

Mailing Address

201 E Huron St, 12th Fl Suite 105

Chicago, IL 606113197

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.