Mark Greenwald, - Medicare Ophthalmology in Denver, CO

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Mark Greenwald, is a medicare enrolled "Ophthalmology" physician in Denver, Colorado. His current practice location is 777 Bannock St, Denver, Colorado. You can reach out to his office (for appointments etc.) via phone at (303) 436-4949.

Mark Greenwald is licensed to practice in Colorado (license number DR.0070955) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1720144975.

Contact Information

Mark Greenwald,
777 Bannock St,
Denver, CO 80204-4597
(303) 436-4949
(303) 602-4560

Map and Direction




Physician's Profile

Full NameMark Greenwald
GenderMale
SpecialityOphthalmology
Location777 Bannock St, Denver, Colorado
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1720144975
  • Provider Enumeration Date: 12/29/2006
  • Last Update Date: 02/11/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 5799677530
  • Enrollment ID: I20041112000737

Medical Identifiers

Medical identifiers for Mark Greenwald such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1720144975NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207W00000XOphthalmology 036055837 (Illinois)Secondary
207W00000XOphthalmology DR.0070955 (Colorado)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Mark Greenwald allows following entities to bill medicare on his behalf.
Entity NameUniversity Of Chicago
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1821048786
PECOS PAC ID: 7719899426
Enrollment ID: O20031103000094
Entity NameIllinois College Of Optometry
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285612390
PECOS PAC ID: 7416851639
Enrollment ID: O20031120000442
Entity NameCook County
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1588612832
PECOS PAC ID: 2860398088
Enrollment ID: O20031209000747

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Mark Greenwald is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Mark Greenwald,
777 Bannock St,
Denver, CO 80204-4597

Ph: (303) 436-4949		Mark Greenwald,
777 Bannock St,
Denver, CO 80204-4597

Ph: (303) 436-4949

Reviews and Comments


Ophthalmology Doctors in Denver, CO

Garrett Conner Nix, MD
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Medicare: May Accept Medicare Assignments
Practice Location: 777 Bannock St, Denver, CO 80204
Phone: 303-602-8550    
Mariam Syed Ahmad, M.D.
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Medicare: Accepting Medicare Assignments
Practice Location: 777 Bannock St # Mc0156, Denver, CO 80204
Phone: 303-602-8550    
James B Giltner, MD
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Phone: 303-839-7878    Fax: 303-759-9375
Pamela M Lepore,
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Practice Location: 2045 Franklin St, Denver, CO 80205
Phone: 303-861-3364    Fax: 303-861-3138
Dr. Chester Thomas Roe Iii, M.D.
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Practice Location: 4999 E Kentucky Ave, Suite 203, Denver, CO 80246
Phone: 303-758-5477    Fax: 303-758-3069
David Drucker,
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Medicare: Accepting Medicare Assignments
Practice Location: 1255 19th St, Suite 101, Denver, CO 80202
Phone: 303-293-9311    Fax: 303-293-8028
Dr. Menachem Yonah Weiss, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 3900 E Mexico Ave Ste 102, Denver, CO 80210
Phone: 720-524-1001    Fax: 303-800-2078

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.