DONALD S. DIEFENDORF P.A.-C
NPI 1437187002
Physician Assistant - Medical in Baltimore, MD

NPI Status: Active since June 30, 2006

Contact Information

2700 QUARRY LAKE DR STE 300
BALTIMORE, MD
ZIP 21209
Phone: (410) 377-8900
Fax: (410) 377-0576

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  • Individual
  • Male
  • Years of Experience 28
  • Physician Assistant
  • Medical
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About DONALD DIEFENDORF

This page provides the complete NPI Profile along with additional information for Donald Diefendorf, a primary care provider established in Baltimore, Maryland with a medical specialization in Physician Assistant, focusing in medical and more than 28 years of experience. The healthcare provider is registered in the NPI registry with number 1437187002 assigned on June 2006. The practitioner's primary taxonomy code is 363AM0700X with license number C0002134 (MD). The provider is registered as an individual and his NPI record was last updated 6 years ago.

NPI
1437187002
Provider Name
DONALD S. DIEFENDORF P.A.-C
Gender
Male
Entity Type
Individual
Location Address
2700 QUARRY LAKE DR STE 300 BALTIMORE, MD 21209
Location Phone
(410) 377-8900
Location Fax
(410) 377-0576
Mailing Address
2700 QUARRY LAKE DR STE 300 BALTIMORE, MD 21209
Mailing Phone
(410) 377-8900
Mailing Fax
(410) 377-0576
Medical School Name
OTHER
Graduation Year
1998
Is Sole Proprietor?
No
Enumeration Date
06-30-2006
Last Update Date
03-04-2019
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A primary care provider (PCP) like Donald Diefendorf sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc

Location Map

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

Physician Assistant Medical

Taxonomy Code
363AM0700X
Type
Physician Assistants & Advanced Practice Nursing Providers
License No.
C0002134
License State
MD

Medicare Participation & PECOS Enrollment Status

Donald Diefendorf 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.

Donald Diefendorf 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: 8820006935

    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: I20060331000326

    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.

Administration of influenza virus vaccine

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

This service was performed 51 times for 51 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

This service was performed 38 times for 38 patients

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 14 times for 14 patients

Established patient office or other outpatient visit, 20-29 minutes

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

This service was performed 55 times for 48 patients

Established patient office or other outpatient visit, 30-39 minutes

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

This service was performed 150 times for 94 patients

Influenza vaccine split virus, preservative free

The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.

This service was performed 27 times for 27 patients

Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage

The quadrivalent inactivated influenza vaccine is a shot given to protect against four strains of the flu virus. This 0.5 ml dosage helps your body develop immunity to the virus. It's an important step in preventing flu-related complications.

This service was performed 21 times for 21 patients

New patient office or other outpatient visit, 30-44 minutes

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

This service was performed 11 times for 11 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

This service was performed 59 times for 55 patients

Telephone medical discussion with physician, 11-20 minutes

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

This service was performed 35 times for 27 patients

Telephone medical discussion with physician, 21-30 minutes

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

This service was performed 23 times for 20 patients

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. Donald Diefendorf is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
MERCY MEDICAL CENTER INC301 SAINT PAUL PLACE
BALTIMORE, MD 21202
(410) 332-9237Acute Care Hospitals

Reviews for DONALD S. DIEFENDORF P.A.-C

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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.
1437187002
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
2467281400
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 4 + 6 + 7 + 2 + 8 + 1 + 4 + 0 + 0 + 24 = 58
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
60 - 58 = 22

The NPI number 1437187002 is valid because the calculated check digit 2 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
1861754830 SARAH BAKER CRNP
Individual
Nurse Practitioner (Adult Health)2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1033227350 CYNTHIA HOFFMAN PT
Individual
Physical Therapist2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1184178097 SARAH KOTEEN SCHEFF DPT
Individual
Physical Therapist2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1639183312MRS. LINDSAY A KEHRING DPT, MTC
Individual
Physical Therapist2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1487786810DR. JEREMY S ALTER P.T., DSCPT
Individual
Physical Therapist2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1487125340 JENNIFER M PEDERSON PA-C
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1942754833 STEVEN SHINSKY DPT
Individual
Physical Therapist2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1770533754MS. CARLA ANNA CROSBY PT/CHT
Individual
Physical Therapist (Hand)2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1093069460 JENNIFER ROSE TAWIL PA-C
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1326482407DR. YONAH HELLER M.D.
Individual
Orthopaedic Surgery2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1093358418 BRADY ALAN PERROTT PA-C
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1689237117 DANIEL M AKKERMAN DPT
Individual
Physical Therapist2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1245812155 MIRANDA KLEIN
Individual
Physical Therapy Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1396865176 FRANK MICHAEL DELOSSO PA
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1598726978MRS. IVONA M BANHAM PA-C
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 768-5555
1316422561 COLIN PATRICK RAINEY PA
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1336698497 CHRISTEL MERCADO BONNEVILLE PA-C
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1518514892 MEAGAN ALEXANDRA-WARD FERNANDEZ PA-C
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1902381353 BRANDON ALLAN WILSON PA-C
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900
1972027779 REBECCA WEBB
Individual
Physician Assistant2700 QUARRY LAKE DR STE 300
BALTIMORE, MD 21209
(410) 377-8900

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1437187002, enumerated in the NPI registry as an "individual" on June 30, 2006

The provider is located at 2700 Quarry Lake Dr Ste 300 Baltimore, Md 21209 and the phone number is (410) 377-8900

The provider's speciality is Physician Assistant with taxonomy code 363AM0700X with a focus in Medical

The provider has more than 28 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.

The most common procedures or services performed by this practitioner are: Administration of influenza virus vaccine, Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, Established patient office or other outpatient visit, 10-19 minutes, Established patient office or other outpatient visit, 20-29 minutes, Established patient office or other outpatient visit, 30-39 minutes, Influenza vaccine split virus, preservative free, Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage, New patient office or other outpatient visit, 30-44 minutes, Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report, Telephone medical discussion with physician, 11-20 minutes and Telephone medical discussion with physician, 21-30 minutes.

The practitioner is affiliated to the following hospital(s): MERCY MEDICAL CENTER INC. Hospital affiliations are identified through self-reporting data and service claims based on the place of service.

This NPI record was last updated on June 30, 2006. 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].
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