Dr Nicholas William Karlow, MD - Medicare Emergency Medicine in Saint Louis, MO

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Dr Nicholas William Karlow, MD is a medicare enrolled "Emergency Medicine" physician in Saint Louis, Missouri. His current practice location is 11133 Dunn Rd, Dept Emergency Med, Saint Louis, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 362-9123.

Dr Nicholas William Karlow is licensed to practice in Missouri (license number 2022044117) 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 1922669167.

Contact Information

Dr Nicholas William Karlow, MD
11133 Dunn Rd, Dept Emergency Med,
Saint Louis, MO 63136-6163
(314) 362-9123
(314) 747-9160

Map and Direction




Physician's Profile

Full NameDr Nicholas William Karlow
GenderMale
SpecialityEmergency Medicine
Location11133 Dunn Rd, Saint Louis, Missouri
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1922669167
  • Provider Enumeration Date: 06/27/2019
  • Last Update Date: 09/09/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 0547596777
  • Enrollment ID: I20230311000039

Medical Identifiers

Medical identifiers for Dr Nicholas William Karlow such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1922669167NPI-NPPES
200071816MedicaidMO

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 2022044117 (Missouri)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. Dr Nicholas William Karlow allows following entities to bill medicare on his behalf.
Entity NameMercy Hospital South
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1568481984
PECOS PAC ID: 8426962556
Enrollment ID: O20031113000592
Entity NameMercy Hospitals East Communities
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1427098169
PECOS PAC ID: 1658276811
Enrollment ID: O20031209000789
Entity NameMercy Hospitals East Communities
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285664177
PECOS PAC ID: 3779479019
Enrollment ID: O20040224001164
Entity NameMercy Hospital Jefferson
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1508859661
PECOS PAC ID: 1254248271
Enrollment ID: O20050518000926
Entity NameSoutheastern Emergency Physicians Of Memphis Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1437105277
PECOS PAC ID: 5395643209
Enrollment ID: O20060711000434
Entity NamePhysician Specialists Of St Lukes Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1235168410
PECOS PAC ID: 1557366960
Enrollment ID: O20060918000462
Entity NameEmergency Physicians Of St Lukes Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1215359815
PECOS PAC ID: 3779714142
Enrollment ID: O20140327001965

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 William Karlow 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 William Karlow, MD
Po Box 7412011,
Chicago, IL 60674-2011

Ph: (314) 362-9123		Dr Nicholas William Karlow, MD
11133 Dunn Rd, Dept Emergency Med,
Saint Louis, MO 63136-6163

Ph: (314) 362-9123

Reviews and Comments


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Phone: 314-362-9123    Fax: 314-362-0478

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.