Dr Nicholas Withrow Greco, MD - Medicare Emergency Medicine in Pasadena, CA

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Dr Nicholas Withrow Greco, MD is a medicare enrolled "Emergency Medicine" physician in Pasadena, California. He graduated from medical school in 2009 and has 15 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice Hmh Emergency Medical Group, Inc., Exer Medical Corporation and his current practice location is 100 W California Blvd, Pasadena, California. You can reach out to his office (for appointments etc.) via phone at (626) 397-5112.

Dr Nicholas Withrow Greco is licensed to practice in California (license number A113953) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1023325289.

Contact Information

Dr Nicholas Withrow Greco, MD
100 W California Blvd,
Pasadena, CA 91105-3010
(626) 397-5112
Not Available

Map and Direction




Physician's Profile

Full NameDr Nicholas Withrow Greco
GenderMale
SpecialityEmergency Medicine
Experience15 Years
Location100 W California Blvd, Pasadena, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Nicholas Withrow Greco graduated from medical school in 2009
  NPI Data:
  • NPI Number: 1023325289
  • Provider Enumeration Date: 09/09/2010
  • Last Update Date: 08/21/2013
  Medicare PECOS Information:
  • PECOS PAC ID: 6608026893
  • Enrollment ID: I20121024000601

Medical Identifiers

Medical identifiers for Dr Nicholas Withrow Greco such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1023325289NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine A113953 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Huntington Memorial HospitalPasadena, CAHospital
Lac+usc Medical CenterLos angeles, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Hmh Emergency Medical Group, Inc.791180082647
Exer Medical Corporation9032359534248

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. Dr Nicholas Withrow Greco allows following entities to bill medicare on his behalf.
Entity NameProvidence Facey Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1710031588
PECOS PAC ID: 3173436276
Enrollment ID: O20031105000822
Entity NameHmh Emergency Medical Group, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659383024
PECOS PAC ID: 7911800826
Enrollment ID: O20040128001215
Entity NameGolden State Emergency Physicians Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1770886558
PECOS PAC ID: 4981885951
Enrollment ID: O20110223001018
Entity NameExer Medical Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1588901532
PECOS PAC ID: 9032359534
Enrollment ID: O20130705000153

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. Dr Nicholas Withrow Greco 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
Dr Nicholas Withrow Greco, MD
100 W California Blvd,
Pasadena, CA 91105-3010

Ph: (626) 397-5112		Dr Nicholas Withrow Greco, MD
100 W California Blvd,
Pasadena, CA 91105-3010

Ph: (626) 397-5112

Reviews and Comments


Emergency Medicine Doctors in Pasadena, CA

Dr. David Michael Ulick, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 W California Blvd, Department Of Emergency Medicine, Pasadena, CA 91109
Phone: 626-397-5106    
Dr. Paul Chahn Rhee, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 W California Blvd, Pasadena, CA 91105
Phone: 626-397-3445    Fax: 626-397-5643
Dr. Asbasia Aboelkhair Mikhail, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 W California Blvd, Pasadena, CA 91105
Phone: 626-397-3445    Fax: 626-397-5643
Dr. Charles Walter Bugg, M.D., PH.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 W California Blvd, Pasadena, CA 91125
Phone: 626-397-5116    
Asa Kristian Scott, ATC
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 2560 Lambert Dr, Pasadena, CA 91107
Phone: 626-616-2622    
Dr. Joanna Maack, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 100 W California Blvd, Pasadena, CA 91105
Phone: 917-929-7870    

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.