Merle L Diamond, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

036063282 Issued in IL

Practice address

1460 N Halsted St Ste 501
Chicago, IL 60642-2615

Phone

(773) 388-6390

Fax

(312) 867-7101

NPI assigned

Aug 17, 2005

Last updated

Oct 31, 2025By the provider in NPPES

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in IL

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Internal Medicine

Education

Northwestern University Feinberg Medical School, 1980

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Endeavor Health Medical GroupGroup PAC ID 2163334699, 3,330 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Northwest Community Hospital 1 Hospital, Arlington Heights, IL, CCN 140252
• Presence Saint Joseph Hospital - Chicago Hospital, Chicago, IL, CCN 140224

Merit-based Incentive Payment System (MIPS)

Final score

21.39 of 100Reported as individual

Quality

0

Improvement activities

0

Cost

71.29

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mdiamond207449@direct.nch.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Endeavor Health Medical Group

  dba NorthShore University HealthSystem Faculty Practice Associates

  • Emergency Medicine Physician
  • Evanston, IL
  • NPI 1497701882

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Diamond Headache Clinic LTD

  • Specialist
  • Chicago, IL
  • NPI 1912027665
  Authorized official Same address or phone
• Endeavor Health Medical Group

  dba NorthShore Anesthesia Group

  • Anesthesiology Physician
  • Evanston, IL
  • NPI 1265695944
  NPD
• Major Hospital

  • General Acute Care Hospital
  • Shelbyville, IN
  • NPI 1174555692
  NPD (past)
• Ozarks Medical Center

  dba Ozarks Healthcare

  • General Acute Care Hospital
  • West Plains, MO
  • NPI 1831115641
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Northwest Community Hospital

  dba Endeavor Health Northwest Community Hospital

  • General Acute Care Hospital
  • Arlington Heights, IL
  • NPI 1578932869
  Care Compare affiliation
• Northwest Community Hospital

  dba Endeavor Health Northwest Community Hospital

  • General Acute Care Hospital
  • Arlington Heights, IL
  • NPI 1770531600
  Care Compare affiliation
• Presence Chicago Hospitals Network

  dba Presence Saint Joseph Hospital-Chicago

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1679659585
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1124236800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761868800000",
    "number": "1780676668",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2650 RIDGE AVE STE 1223",
            "city": "EVANSTON",
            "state": "IL",
            "postal_code": "602011700",
            "telephone_number": "847-570-2040",
            "fax_number": "847-733-5315"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1460 N HALSTED ST STE 501",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606422615",
            "telephone_number": "773-388-6390",
            "fax_number": "312-867-7101"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIAMOND",
        "first_name": "MERLE",
        "middle_name": "L",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2005-08-17",
        "last_updated": "2025-10-31",
        "certification_date": "2025-10-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036063282",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ann Diamond, PSY.D.
• Jennifer Diamond, LCSW
• Jennifer Diamond, PHD
• Katherine Eileen Diamond, CRNA
• Mary A Diamond, LCSW
• Morgan Diamond
• Rachel Marie Diamond, PHD, LMFT
• Ruth M Diamond, FNP-BC
• Sarah Alajajian Diamond, PA-C
• Rachel Dian

• Internal Medicine Physician in Chicago, IL
• Providers in Chicago, IL by specialty
• Internal Medicine Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 31, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.