DR. JOHN PIERPONT MASSEY IV M.D.
NPI 1609969724
Internal Medicine in Bethesda, MD
NPI Status: Active since October 02, 2006
Contact Information
8901 ROCKVILLE PIKE
BETHESDA, MD
ZIP 20889
Phone: (301) 295-0196
Fax: (301) 400-0616
- Individual
- Male
- Internal Medicine
About JOHN MASSEY
This page provides the complete NPI Profile along with additional information for John Massey, an internist established in Bethesda, Maryland with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1609969724 assigned on October 2006. The practitioner's primary taxonomy code is 207R00000X with license number MD33079 (DC). The provider is registered as an individual and his NPI record was last updated February 2025.
- NPI
- 1609969724
- Provider Name
- DR. JOHN PIERPONT MASSEY IV M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 8901 ROCKVILLE PIKE BETHESDA, MD 20889
- Location Phone
- (301) 295-0196
- Location Fax
- (301) 400-0616
- Mailing Address
- 1855 SHEPHERD ST NW WASHINGTON, DC 20011
- Mailing Phone
- (202) 882-4902
- Is Sole Proprietor?
- No
- Enumeration Date
- 10-02-2006
- Last Update Date
- 02-19-2025
- Code Navigator
An internist like John Massey 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
- Taxonomy Code
- 207R00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- MD33079
- License State
- DC
- Taxonomy Description
- A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
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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. | |||||||||
| 1 | 6 | 0 | 9 | 9 | 6 | 9 | 7 | 2 | 4 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 6 | 0 | 9 | 18 | 6 | 18 | 7 | 4 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 6 + 0 + 9 + 1 + 8 + 6 + 1 + 8 + 7 + 4 + 24 = 76 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 80 - 76 = 4 | 4 | ||||||||
The NPI number 1609969724 is valid because the calculated check digit 4 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 |
|---|---|---|---|
| 1871594291 | WILLIAM H.J. HAFFNER M.D. Individual | Obstetrics & Gynecology | 8901 ROCKVILLE PIKE OBG NNMC BETHESDA, MD 20889 (301) 295-4390 |
| 1942288360 | DR. BRIAN HUNTINGTON HALL M.D. Individual | Pediatrics (Neonatal-Perinatal Medicine) | 8901 ROCKVILLE PIKE BUILDING 10, 6TH FLOOR (NICU) BETHESDA, MD 20889 (301) 319-4691 |
| 1538148143 | DR. MICHAEL PATRICK MCNALLY MD Individual | Surgery | 8901 ROCKVILLE PIKE DEPARTMENT OF SURGERY BETHESDA, MD 20889 (301) 295-2420 |
| 1912969098 | KASSANDRA MERKER M.D. Individual | Pediatrics | 8901 ROCKVILLE PIKE PEDIATRICS - NNMC BETHESDA, MD 20889 (301) 295-4941 |
| 1679536908 | DANIEL HEBERT MD Individual | Orthopaedic Surgery (Sports Medicine) | 8901 ROCKVILLE PIKE DEPARTMENT OF ORTHPAEDIC SURGERY BETHESDA, MD 20889 (571) 477-0190 |
| 1851348080 | TANYA MARIE WROBLEWSKI MD Individual | Internal Medicine (Hematology & Oncology) | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 319-7768 |
| 1316047699 | DR. KAREN MARY FARIZO M.D. Individual | Pediatrics | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 295-4941 |
| 1073694972 | PATRICIA M SMITH PA-C Individual | Physician Assistant (Medical) | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 295-4420 |
| 1417038803 | JOHN KEELING Organization | Neuromusculoskeletal Medicine, Sports Medicine | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 295-0730 |
| 1467526152 | DR. DUANE CARL CANEVA MD Individual | Emergency Medicine | 8901 ROCKVILLE PIKE DEPT OF EMERGENCY MEDICINE BETHESDA, MD 20889 (301) 295-4749 |
| 1124187448 | DR. WYATT S SMITH D.O. Individual | Internal Medicine (Hematology & Oncology) | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 295-4810 |
| 1336204635 | DR. DAVID ALDEN WEIS MD Individual | Psychiatry & Neurology (Psychiatry) | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 295-0500 |
| 1851446827 | MR. SAMUEL PRIAGOLA Individual | Military Health Care Provider (Independent Duty Corpsman) | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 295-1565 |
| 1497801260 | DR. MARY ELIZABETH MANISCALCO-THEBERGE M.D. Individual | Surgery | 8901 ROCKVILLE PIKE DEPARTMENT OF SURGERY, NATIONAL NAVAL MEDICAL CENTER BETHESDA, MD 20889 (301) 295-0290 |
| 1477696003 | DR. REBECCA CHASON M.D. Individual | Obstetrics & Gynecology | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 295-2048 |
| 1518000173 | DR. LANA SHIU M.D. Individual | Internal Medicine | 8901 ROCKVILLE PIKE INTERNAL MEDICINE CLINIC BETHESDA, MD 20889 (301) 319-8238 |
| 1700920246 | DR. WILLIAM FREDERICK ANDERSON M.D. Individual | Specialist | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 319-4789 |
| 1508985300 | DR. MARY JEAN HERDEN MD Individual | Pediatrics | 8901 ROCKVILLE PIKE NATIONAL NAVAL MEDICAL CENTER BETHESDA, MD 20889 (410) 631-7461 |
| 1285828822 | DR. BENEDICT ARTHUR BAIDOO PHARMD. Individual | Pharmacist | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 319-4217 |
| 1649454398 | DR. DANIEL PELTON PHD Individual | Psychologist (Clinical) | 8901 ROCKVILLE PIKE BETHESDA, MD 20889 (301) 295-4611 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1609969724, enumerated in the NPI registry as an "individual" on October 02, 2006
The provider is located at 8901 Rockville Pike Bethesda, Md 20889 and the phone number is (301) 295-0196
The provider's speciality is Internal Medicine with taxonomy code 207R00000X
This NPI record was last updated on October 02, 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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