Active NPI 1780676668 Individual Practitioner Female Practitioner

Dr. Merle L Diamond , MD

Internal Medicine • Chicago, IL

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. Merle Diamond, MD is a certified Internal Medicine practicing in Chicago, IL. With approximately 46 years of clinical experience since graduating from Northwestern University Feinberg Medical School in 1980, Dr. Diamond delivers high-quality medical care to the local community at 1460 N HALSTED ST STE 501.

Dr. Diamond is affiliated with Endeavor Health Medical Group and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include injection, onabotulinumtoxina, 1 unit, subsequent hospital care with moderate levelof medical decision making, if using time, at least, established patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1460 N Halsted St Ste 501

Chicago, IL 606422615

Telephone 7733886390

Fax 3128677101

Associated Practice Facility / Clinic

🏢 Diamond Headache Clinic Ltd Facility NPI 1912027665

Medicare Profile & Education

Medical School

Northwestern University Feinberg Medical School

Graduation Year

1980

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

46 Yrs +24.2 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

71.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Diamond (46 Years) 46 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
J0585 Injection, onabotulinumtoxina, 1 unit	27,712	58	$14.00	$6.25
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	835	82	$400.00	$113.06
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	465	271	$300.00	$127.33
99213 Established patient office or other outpatient visit, typically 15 minutes	445	223	$200.00	$89.51
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	376	248	$75.01	$16.82
64615 Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face	141	60	$1150.00	$170.04
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	99	38	$75.00	$13.62
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	98	78	$700.00	$171.97
99239 Hospital discharge day management, more than 30 minutes	93	72	$400.00	$107.27
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	55	55	$500.00	$222.78
80305 Testing for presence of drug, read by direct observation	45	41	$50.00	$11.15
J1885 Injection, ketorolac tromethamine, per 15 mg	42	11	$12.50	$0.67
J1230 Injection, methadone hcl, up to 10 mg	42	20	$50.00	$18.41
J2550 Injection, promethazine hcl, up to 50 mg	42	20	$25.00	$3.12
J1010 Injection, methylprednisolone acetate, 1 mg	27	19	$25.00	$0.13
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	11	11	$400.00	$186.76

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J0585 Injection, onabotulinumtoxina, 1 unit	18,072	42	$14.00	$6.17
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	1,239	100	$400.00	$117.71
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	772	358	$300.00	$126.68
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	137	96	$700.00	$174.44
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	110	41	$75.00	$14.29
80305 Testing for presence of drug, read by direct observation	105	90	$50.00	$12.14
99239 Hospital discharge day management, more than 30 minutes	91	64	$400.00	$114.71
64615 Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face	82	40	$1150.00	$170.82
99213 Established patient office or other outpatient visit, typically 15 minutes	73	56	$200.00	$85.79
J1885 Injection, ketorolac tromethamine, per 15 mg	62	13	$12.50	$0.51
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	59	59	$500.00	$229.47
J2550 Injection, promethazine hcl, up to 50 mg	45	21	$25.00	$3.07
J1040 Injection, methylprednisolone acetate, 80 mg	44	24	$25.00	$11.63
J1230 Injection, methadone hcl, up to 10 mg	37	16	$50.00	$16.27
99495 Transitional care management services for problem of at least moderate complexity	13	12	$300.00	$197.66

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J0585 Injection, onabotulinumtoxina, 1 unit	10,296	22	$14.00	$6.14
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	995	71	$400.00	$100.93
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	694	299	$300.00	$127.09
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	108	38	$75.00	$14.77
99239 Hospital discharge day management, more than 30 minutes	107	65	$400.00	$101.93
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	106	68	$700.00	$196.90
80305 Testing for presence of drug, read by direct observation	88	71	$50.00	$12.18
J2550 Injection, promethazine hcl, up to 50 mg	51	22	$25.00	$2.50
64615 Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face	51	21	$1150.00	$178.14
J1230 Injection, methadone hcl, up to 10 mg	48	22	$50.00	$16.24
99213 Established patient office or other outpatient visit, typically 15 minutes	47	35	$200.00	$97.15
J1040 Injection, methylprednisolone acetate, 80 mg	31	22	$25.00	$11.00
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	27	27	$500.00	$230.30
99495 Transitional care management services for problem of at least moderate complexity	11	11	$300.00	$184.60

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J0585 Injection, onabotulinumtoxina, 1 unit	5,400	13	$11.63	$5.48
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	1,146	86	$400.00	$103.21
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	628	276	$300.00	$132.54
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	122	79	$700.00	$205.30
99239 Hospital discharge day management, more than 30 minutes	117	79	$400.00	$105.73
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	114	36	$75.00	$14.29
J2550 Injection, promethazine hcl, up to 50 mg	55	21	$25.00	$2.18
J1230 Injection, methadone hcl, up to 10 mg	52	23	$50.00	$16.65
J1040 Injection, methylprednisolone acetate, 80 mg	43	24	$25.00	$9.73
80305 Testing for presence of drug, read by direct observation	42	38	$50.00	$12.60
64615 Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face	32	16	$1150.00	$157.27
99495 Transitional care management services for problem of at least moderate complexity	26	24	$300.00	$198.29
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	24	24	$500.00	$223.25
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	22	17	$400.00	$191.73
99213 Established patient office or other outpatient visit, typically 15 minutes	17	17	$200.00	$93.74

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J0585 Injection, onabotulinumtoxina, 1 unit	7,400	19	$10.00	$6.07
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	925	62	$400.00	$105.18
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	560	261	$300.00	$112.08
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	111	64	$700.00	$205.36
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	97	33	$75.00	$14.29
99239 Hospital discharge day management, more than 30 minutes	96	55	$400.00	$105.32
J2550 Injection, promethazine hcl, up to 50 mg	53	25	$25.00	$2.00
80305 Testing for presence of drug, read by direct observation	47	43	$50.00	$12.18
J1230 Injection, methadone hcl, up to 10 mg	43	20	$50.00	$15.96
64615 Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face	43	21	$1150.00	$178.92
J1040 Injection, methylprednisolone acetate, 80 mg	28	18	$25.00	$11.19
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	27	27	$500.00	$223.89
99213 Established patient office or other outpatient visit, typically 15 minutes	19	13	$200.00	$77.62
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	13	13	$400.00	$154.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	839	65	$400.00	$101.60
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	531	231	$300.00	$110.02
80305 Testing for presence of drug, read by direct observation	186	130	$50.00	$11.96
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	167	46	$78.59	$15.64
99239 Hospital discharge day management, more than 30 minutes	104	57	$400.00	$106.68
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	103	61	$700.00	$206.11
J2550 Injection, promethazine hcl, up to 50 mg	94	33	$25.00	$1.94
J1230 Injection, methadone hcl, up to 10 mg	75	29	$50.00	$16.56
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	71	68	$400.00	$144.86
J1040 Injection, methylprednisolone acetate, 80 mg	55	27	$25.00	$10.81
J1885 Injection, ketorolac tromethamine, per 15 mg	42	11	$12.50	$0.49
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	30	30	$500.00	$214.96
64615 Injection of chemical for paralysis of facial and neck nerve muscles on both sides of face	20	11	$1150.00	$164.58
99213 Established patient office or other outpatient visit, typically 15 minutes	18	11	$200.00	$78.58

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	884	85	$400.00	$102.49
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	546	221	$300.00	$106.76
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	213	63	$75.00	$20.12
80305 Testing for presence of drug, read by direct observation	192	137	$50.00	$12.83
J2550 Injection, promethazine hcl, up to 50 mg	118	47	$25.00	$1.80
99239 Hospital discharge day management, more than 30 minutes	114	79	$400.00	$106.12
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	107	71	$700.00	$194.26
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	102	93	$400.00	$145.65
J1230 Injection, methadone hcl, up to 10 mg	100	39	$50.00	$17.19
J1040 Injection, methylprednisolone acetate, 80 mg	64	37	$25.00	$12.13
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	34	34	$500.00	$203.91

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	852	99	$400.00	$102.21
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	444	187	$300.23	$105.22
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	280	64	$75.00	$24.78
80305 Testing for presence of drug, read by direct observation	229	147	$50.00	$14.66
J1885 Injection, ketorolac tromethamine, per 15 mg	206	16	$12.50	$0.57
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	191	150	$400.00	$142.65
J2550 Injection, promethazine hcl, up to 50 mg	151	48	$25.00	$2.22
J1230 Injection, methadone hcl, up to 10 mg	132	41	$50.00	$18.04
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	110	79	$700.00	$198.58
99239 Hospital discharge day management, more than 30 minutes	109	76	$400.00	$104.38
J1040 Injection, methylprednisolone acetate, 80 mg	82	39	$25.00	$10.29
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	43	43	$500.00	$203.78
36415 Insertion of needle into vein for collection of blood sample	15	14	$25.00	$2.84

Medical Specialties & State Licenses

CMS Verified: 2025-10-31

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License IL 036063282

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

Endeavor Health Medical Group

800 W Central Rd, Arlington Heights, IL 600052349

Phone: 8476181000

Endeavor Health Medical Group

2150 Pfingsten Rd, Glenview, IL 600261326

Endeavor Health Medical Group

1460 N Halsted St, Chicago, IL 606422615

Phone: 8476183590

Endeavor Health Medical Group

2650 Ridge Ave, Evanston, IL 602011700

Practice Associates & Co-Workers

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

15 Associated Practitioners

Hannah West , PA-C

Physician Assistant

NPI 1063958684

Physician Assistant (Certified)

Dr. Bradley Torphy , MD

Family Medicine

NPI 1104052372

Doctor of Medicine (M.D.)

Dr. George Nissan , DO

Internal Medicine

NPI 1245222033

Doctor of Osteopathic Medicine (D.O.)

Joshua Mueller , PA-C

Physician Assistant

NPI 1336401355

Physician Assistant (Certified)

Dr. Betsy Pepper , MD

Specialist

NPI 1437141223

Doctor of Medicine (M.D.)

Gayle Blake , PA-C

Physician Assistant

NPI 1487693461

Physician Assistant (Certified)

Career & Practice History Timeline

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

12 Historical Events

📍

Updated Business Mailing Address October 31, 2025

Registered at 2650 RIDGE AVE STE 1223, EVANSTON, IL 602011700 (Tel: 8475702040)

✅

NPI Profile Active December 26, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location December 26, 2017

Registered at 1460 N HALSTED ST STE 501, CHICAGO, IL 606422615 (Tel: 7733886390)

📍

Updated Business Mailing Address December 26, 2017

Registered at 1460 N HALSTED ST STE 501, CHICAGO, IL 606422615 (Tel: 7733886390)

👤

Provider Name / Credentials Updated December 26, 2017

Recorded as MERLE DIAMOND, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 26, 2017

Internal Medicine (License #036063282 in IL)

✅

NPI Profile Active November 11, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location November 11, 2016

Registered at 1460 N HALSTED ST, STE 501, CHICAGO, IL 606422605 (Tel: 7733886390)

📍

Updated Business Mailing Address November 11, 2016

Registered at 1460 N HALSTED ST, STE 501, CHICAGO, IL 606422605 (Tel: 7733886390)

👤

Provider Name / Credentials Updated November 11, 2016

Recorded as MERLE DIAMOND, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) November 11, 2016

Internal Medicine (License #036063282 in IL)

🟢

Initial NPI Registration & Enumeration August 17, 2005

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: 1780676668

Entity Type:

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

Enumeration Date: August 17, 2005

Last Update: October 31, 2025

Sole Proprietor: No

Update or Correct Profile

Mailing Address

2650 Ridge Ave Ste 1223

Evanston, IL 602011700

Phone: 8475702040

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.