MS. MARGARET ELIZABETH HAMM NP
NPI 1174034375
Nurse Practitioner in Washington, DC

NPI Status: Active since October 16, 2017

Contact Information

3800 RESERVOIR RD NW
WASHINGTON, DC
ZIP 20007
Phone: (202) 444-5842

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  • Individual
  • Female
  • Years of Experience 9
  • Nurse Practitioner
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About MARGARET HAMM

This page provides the complete NPI Profile along with additional information for Margaret Hamm, a provider established in Washington, District Of Columbia with a medical specialization in Nurse Practitioner and more than 9 years of experience. The healthcare provider is registered in the NPI registry with number 1174034375 assigned on October 2017. The practitioner's primary taxonomy code is 363L00000X with license number RN1020006 (DC). The provider is registered as an individual and her NPI record was last updated 8 years ago.

NPI
1174034375
Provider Name
MS. MARGARET ELIZABETH HAMM NP
Gender
Female
Entity Type
Individual
Location Address
3800 RESERVOIR RD NW WASHINGTON, DC 20007
Location Phone
(202) 444-5842
Mailing Address
3800 RESERVOIR RD NW WASHINGTON, DC 20007
Medical School Name
OTHER
Graduation Year
2017
Is Sole Proprietor?
No
Enumeration Date
10-16-2017
Last Update Date
10-16-2017
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A nurse practitioner (NP) like Margaret Hamm is an experienced registered nurse with a master’s or doctoral degree and advanced clinical training. Nurse practitioners can work in many different specialties including primary care, pediatrics, cardiology, emergency, women’s health, oncology or geriatrics. Nurse practitioners provide services like physical exams, order laboratory tests, manage diseases, write prescriptions, etc.

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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Nurse Practitioner

Taxonomy Code
363L00000X
Type
Physician Assistants & Advanced Practice Nursing Providers
License No.
RN1020006
License State
DC
Taxonomy Description
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Medicare Participation & PECOS Enrollment Status

Margaret Hamm is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Margaret Hamm is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 8628338258

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20180130002607

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Established patient office or other outpatient visit, 10-19 minutes

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

This service was performed 25 times for 24 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $25.07 for a new patient copayment and $28.43 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 20007 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

  • Average New Patient Price $100.31
  • Minimum New Patient Price $65.18
  • Maximum New Patient Price $194.86
  • Average New Patient Copayment $25.07
  • Minimum New Patient Copayment $16.29
  • Maximum New Patient Copayment $48.71

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $113.72
  • Minimum Established Patient Price $21.4
  • Maximum Established Patient Price $158.88
  • Average Established Patient Copayment $28.43
  • Minimum Established Patient Copayment $5.35
  • Maximum Established Patient Copayment $39.72

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Margaret Hamm is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
MEDSTAR SAINT MARY'S HOSPITAL25500 POINT LOOKOUT ROAD
LEONARDTOWN, MD 20650
(301) 475-6001Acute Care Hospitals
MEDSTAR SOUTHERN MARYLAND HOSPITAL CENTER7503 SURRATTS ROAD
CLINTON, MD 20735
(301) 868-8000Acute Care Hospitals
RESTON HOSPITAL CENTER1850 TOWN CENTER PARKWAY
RESTON, VA 20190
(703) 689-9000Acute Care Hospitals

Reviews for MS. MARGARET ELIZABETH HAMM NP

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1174034375
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
21144038314
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 1 + 1 + 4 + 4 + 0 + 3 + 8 + 3 + 1 + 4 + 24 = 55
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
60 - 55 = 55

The NPI number 1174034375 is valid because the calculated check digit 5 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 20 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1396748802 JOHN HUGH LYNCH MD
Individual
Urology3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-4922
1689679870 AGNIESZKA ZOFIA PLUTA MD
Individual
Pediatrics (Pediatric Gastroenterology)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-4673
1124023924 MIRANDA JEANETTE ADAMS MS
Individual
Audiologist3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 687-5176
1073511275 VALIOLLAH ABBASSI
Individual
Pediatrics (Pediatric Endocrinology)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-8881
1225036353 JAMES BARANIUK MD
Individual
Internal Medicine (Allergy & Immunology)3800 RESERVOIR RD NW RM B-105 LOWER LEVEL KOBER-COGAN BLDG, GEORGETOWN UNIV
WASHINGTON, DC 20007
(202) 687-2906
1790783843 CARRIE BOWMAN-DALLEY
Individual
Nurse Anesthetist, Certified Registered3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-8640
1053319103 MEGAN ELAINE BREEN
Individual
Obstetrics & Gynecology3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-8531
1871591925 JOHN BUEK
Individual
Obstetrics & Gynecology3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-8531
1225036379 AMY LYNN BURKE
Individual
Internal Medicine3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-8168
1730187832 HEIDI JOY APPEL
Individual
Pediatrics (Pediatric Critical Care Medicine)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-2468
1639177736 EKATHERINE ASATIANI
Individual
Internal Medicine (Hematology & Oncology)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-2198
1780682823 KLEMENS H BARTH
Individual
Radiology (Vascular & Interventional Radiology)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-3734
1407854672 ANISHA A ABRAHAM
Individual
Pediatrics3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-5437
1093713182 SANDRA ALLISON
Individual
Radiology (Body Imaging)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-3400
1548268618 AMAL MOUSA ABU-GHOSH
Individual
Pediatrics (Pediatric Hematology-Oncology)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-7599
1497753503 SHAKIL ASLAM
Individual
Internal Medicine (Nephrology)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-9183
1265430318 JEAN BOLAN
Individual
Obstetrics & Gynecology (Maternal & Fetal Medicine)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-8232
1700884855 PAULA ELISE BOURELLY
Individual
Dermatology3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-8550
1629076724 SUSAN MICHELLE ASCHER
Individual
Radiology (Body Imaging)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-3400
1710985825 CHRISTOPHER ERNST ATTINGER
Individual
Surgery (Plastic and Reconstructive Surgery)3800 RESERVOIR RD NW
WASHINGTON, DC 20007
(202) 444-6161

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1174034375, enumerated in the NPI registry as an "individual" on October 16, 2017

The provider is located at 3800 Reservoir Rd Nw Washington, Dc 20007 and the phone number is (202) 444-5842

The provider's speciality is Nurse Practitioner with taxonomy code 363L00000X

The provider has more than 9 years of experience.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

Medicare beneficiaries should expect a typical cost of $100.31 with an average copayment of $25.07 for new patient appointments. Established patients should expect a typical charge of $113.72 and an average copayment of 28.43. Please review your insurance plan or contact the provider directly to determine your specific costs.

The most common procedures or services performed by this practitioner are: Established patient office or other outpatient visit, 10-19 minutes.

The practitioner is affiliated to the following hospital(s): MEDSTAR SAINT MARY'S HOSPITAL, MEDSTAR SOUTHERN MARYLAND HOSPITAL CENTER and RESTON HOSPITAL CENTER. Hospital affiliations are identified through self-reporting data and service claims based on the place of service.

This NPI record was last updated on October 16, 2017. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.