Doctor profile · Federal record
Dr. Nereida Diaz-Johnson, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Union, NJ
- NPI 1013939917
- Accepts Medicare
- 41 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
2401 Morris Ave
Union, NJ 070835745
(908) 688-5000
fax (908) 688-5220
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- March 31, 2010
- Year of graduation
- 1985 — 41 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- New Jersey #MA49304
- Medicaid
- NJ #0256404
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1013939917. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,320
Distinct HCPCS
10
Medicare allowed
$80,958
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
36415 |
Insertion of needle into vein for collection of blood sample | 299 | 140 | $8 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 248 | 111 | $141 | |
96372 |
Injection of drug or substance under skin or into muscle | 106 | 40 | $16 | |
99457 |
Management using the results of remote vital sign monitoring per calendar month, first 20 minutes | 102 | 16 | $54 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 90 | 90 | $142 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 84 | 78 | $16 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 78 | 49 | $98 | |
J3420 |
Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | 64 | 24 | $1 | |
G0008 |
Administration of influenza virus vaccine | 52 | 51 | $34 | |
99454 |
Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days | 45 | 12 | $59 |
In context: peer comparison
Among 11 peers in this city , average services per provider: 213. This provider delivers 6.2× the peer median.Open Payments
Industry payments received
All-time total
$737
Transactions
42
Manufacturers
14
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Novo Nordisk Inc | 9 | $142.79 | |
| Exact Sciences Corporation | 5 | $124.01 | |
| PFIZER INC. | 5 | $85.94 | |
| GlaxoSmithKline, LLC. | 5 | $81.22 | |
| Dexcom, Inc. | 3 | $51.60 | |
| Otsuka America Pharmaceutical, Inc. | 3 | $48.69 | |
| Abbott Laboratories | 2 | $37.53 | |
| SHIELD THERAPEUTICS INC | 2 | $36.54 | |
| ABBVIE INC. | 2 | $31.92 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 2 | $29.67 | |
| Lilly USA, LLC | 1 | $17.91 | |
| Astellas Pharma US Inc | 1 | $17.75 | |
| Optinose US, Inc. | 1 | $17.37 | |
| SANOFI-AVENTIS U.S. LLC | 1 | $14.03 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,955
Patients
964
Total drug cost
$49,450
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 528 | 171 | $7,956 |
| Amlodipine Besylate | Generic | 349 | 111 | $2,700 |
| Metformin Hcl | Generic | 288 | 90 | $2,648 |
| Levothyroxine Sodium | Generic | 264 | 67 | $5,070 |
| Losartan Potassium | Generic | 225 | 62 | $3,730 |
| Omeprazole | Generic | 161 | 57 | $2,881 |
| Simvastatin | Generic | 155 | 44 | $2,046 |
| Metoprolol Succinate | Generic | 136 | 44 | $3,284 |
| Montelukast Sodium | Generic | 133 | 56 | $3,194 |
| Famotidine | Generic | 129 | 43 | $2,525 |
Frequently asked questions
What is Dr. Nereida Diaz-Johnson's medical specialty?
Dr. Nereida Diaz-Johnson practices Internal Medicine Physician in Union, NJ.
Where does Dr. Nereida Diaz-Johnson practice?
Dr. Nereida Diaz-Johnson practices at 2401 Morris Ave, Union, NJ 070835745. Office phone: 9086885000.
What is Dr. Nereida Diaz-Johnson's NPI?
Dr. Nereida Diaz-Johnson's National Provider Identifier (NPI) is 1013939917, issued by NPPES.
Does Dr. Nereida Diaz-Johnson accept Medicare assignment?
Yes. Dr. Nereida Diaz-Johnson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nereida Diaz-Johnson commonly perform?
Top Medicare-reported procedures in 2023: Insertion of needle into vein for collection of blood sample (HCPCS 36415); Established patient office or other outpatient visit (HCPCS 99214); Injection of drug or substance under skin or into muscle (HCPCS 96372). Source: CMS Medicare Physician & Other Practitioners file.