DR. WILLIAM RAINEY JOHNSON M.D.
NPI 1427443571
Internal Medicine - Cardiovascular Disease in Bethesda, MD

NPI Status: Active since April 04, 2015

Contact Information

8901 WISCONSIN AVE
BUILDING 19, RM 3607
BETHESDA, MD
ZIP 20889
Phone: (301) 295-0451

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  • Individual
  • Male
  • Years of Experience 11
  • Internal Medicine
  • Cardiovascular Disease
  • May Accept Medicare Approved Payment
  • PECOS Enrolled

About WILLIAM JOHNSON

This page provides the complete NPI Profile along with additional information for William Johnson, an internist established in Bethesda, Maryland with a medical specialization in Internal Medicine, focusing in cardiovascular disease and more than 11 years of experience. He graduated from Perelman School Of Med At The University Of Pennsylvania in 2015. The healthcare provider is registered in the NPI registry with number 1427443571 assigned on April 2015. The practitioner's primary taxonomy code is 207RC0000X with license number 0101268523 (VA). The provider is registered as an individual and his NPI record was last updated June 2026.

NPI
1427443571
Provider Name
DR. WILLIAM RAINEY JOHNSON M.D.
Gender
Male
Entity Type
Individual
Location Address
8901 WISCONSIN AVE BUILDING 19, RM 3607 BETHESDA, MD 20889
Location Phone
(301) 295-0451
Mailing Address
620 JOHN PAUL JONES CIR PORTSMOUTH, VA 23708
Mailing Phone
(757) 953-9876
Mailing Fax
Medical School Name
PERELMAN SCHOOL OF MED AT THE UNIVERSITY OF PENNSYLVANIA
Graduation Year
2015
Is Sole Proprietor?
No
Enumeration Date
04-04-2015
Last Update Date
06-11-2026
Code Navigator

An internist like William Johnson is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, 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

Internal Medicine Cardiovascular Disease

Taxonomy Code
207RC0000X
Type
Allopathic & Osteopathic Physicians
License No.
0101268523
License State
VA
Taxonomy Description
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1207R00000XAllopathic & Osteopathic Physicians

Internal Medicine

0101268523 (VA)

Medicare Participation & PECOS Enrollment Status

William Johnson is registered with Medicare but maybe doesn't accept claims assignment. If you are a Medicare beneficiary call and confirm with the provider before seeking any services.

William Johnson 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: 8527341841

    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: I20251205003308

    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? Maybe

    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

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Durable Medical Equipment

  • DME-Oxygen and Supplies (DC000N)

    Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing (HCPCS:E0431)

    3 DME suppliers used 22 Medicare Claims 22 Services Paid

  • DME-Oxygen and Supplies (DC002N)

    Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate (HCPCS:E1390)

    3 DME suppliers used 22 Medicare Claims 22 Services Paid

Physician Visit Costs

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 20889 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

  • Average New Patient Price $147.85
  • Minimum New Patient Price $65.18
  • Maximum New Patient Price $194.86
  • Average New Patient Copayment $36.96
  • 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 99213

  • Average Established Patient Price $80.66
  • Minimum Established Patient Price $21.4
  • Maximum Established Patient Price $158.88
  • Average Established Patient Copayment $20.16
  • 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.

Reviews for DR. WILLIAM RAINEY JOHNSON M.D.

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1427443571, we treat the final digit (1) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 1).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
4
Unchanged
Pos 3
2
Doubled → 4
Pos 4
7
Unchanged
Pos 5
4
Doubled → 8
Pos 6
4
Unchanged
Pos 7
3
Doubled → 6
Pos 8
5
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
1
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 2 → 4 4 → 8 3 → 6 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 4 + 4 + 7 + 8 + 4 + 6 + 5 + 1 + 4 + 24 = 69

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 69 is 70. The difference is the calculated check digit.

70 - 69 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1427443571.

Other Providers at the Same Location


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

Psychiatry & Neurology (Forensic Psychiatry)
8901 WISCONSIN AVE
BETHESDA, MD 20889
Nurse Anesthetist, Certified Registered
8901 WISCONSIN AVE
BETHESDA, MD 20889
Dentist (General Practice)
8901 WISCONSIN AVE, OROFACIAL PAIN CENTER
BETHESDA, MD 20889
Internal Medicine (Endocrinology, Diabetes & Metabolism)
8901 WISCONSIN AVE, NNMC, DEPARTMENT OF ENDOCRINOLOGY & METABOLISM
BETHESDA, MD 20889
Internal Medicine (Infectious Disease)
8901 WISCONSIN AVE
BETHESDA, MD 20889
Anesthesiology
8901 WISCONSIN AVE, NATIONAL NAVAL MEDICAL CENTER
BETHESDA, MD 20889
Social Worker (Clinical)
8901 WISCONSIN AVE
BETHESDA, MD 20889
Social Worker (Clinical)
8901 WISCONSIN AVE, BLDG 5 DECK 2
BETHESDA, MD 20889
Chiropractor
8901 WISCONSIN AVE, BLDG 9
BETHESDA, MD 20889
Social Worker (Clinical)
8901 WISCONSIN AVE, NNMC BREAST CARE CENTER BLDG 10, 4 WEST
BETHESDA, MD 20889
Nurse Practitioner (Pediatrics)
8901 WISCONSIN AVE
BETHESDA, MD 20889
Social Worker (Clinical)
8901 WISCONSIN AVE, C/O NNMC BLDG 10, 7W, RM 7051, CABHC
BETHESDA, MD 20889
Nurse Practitioner (Obstetrics & Gynecology)
8901 WISCONSIN AVE, OB/GYN DEPT, BLDG 9, SUITE 2224
BETHESDA, MD 20889
Dentist (General Practice)
8901 WISCONSIN AVE
BETHESDA, MD 20889
Radiology (Diagnostic Radiology)
8901 WISCONSIN AVE
BETHESDA, MD 20889
Radiology (Diagnostic Radiology)
8901 WISCONSIN AVE, NNMC - DEPARTMENT OF RADIOLOGY
BETHESDA, MD 20889
Radiology (Diagnostic Radiology)
8901 WISCONSIN AVE, NATIONAL NAVAL MEDICAL CENTER
BETHESDA, MD 20889
Internal Medicine (Endocrinology, Diabetes & Metabolism)
8901 WISCONSIN AVE
BETHESDA, MD 20889
Internal Medicine
8901 WISCONSIN AVE
BETHESDA, MD 20889
Emergency Medicine
8901 WISCONSIN AVE, BETHESDA NAVAL MEDICAL CENTER
BETHESDA, MD 20889

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1427443571, enumerated as an "individual" on April 04, 2015.

The provider is located at 8901 WISCONSIN AVE BUILDING 19, RM 3607 BETHESDA, MD 20889 and the phone number is (301) 295-0451.

Internal Medicine with taxonomy code 207RC0000X and a focus in Cardiovascular Disease.