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Edit this profileAt a glance
- 838 Nordahl Rd Ste 300, San Marcos, CA 92069
About Dr. Mcclay
Edward F. McClay, M.D. practices internal medicine in San Marcos, CA. Edward is a 1980 graduate of Temple University School of Medicine. Edward is also listed as specializing in medical oncology. Medicare claims data shows Edward provided 92,805 services to 2,178 patients. The services billed most often include injection, darbepoetin alfa, 1 microgram (non-esrd use), injection, ferric carboxymaltose, 1 mg, and injection, pembrolizumab, 1 mg. The provider's National Provider Identifier (NPI) is 1497727465.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (760) 747-8935
- Email not available
Practice Locations
838 NORDAHL RD STE 300
San Marcos, CA 92069
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Allergies
- Diabetes
- Flu
- Hypothyroidism
- Strep throat
- UTI
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Infectious disease
Kidney and urinary
- Chronic kidney disease
- Enlarged prostate
Respiratory
Blood & Circulation
- Blood clots
Blood disorders
- Anemia
Brain & Nerves
Brain and nerves
- Vertigo
Cardiac and vascular
- AFib
Digestive
- Diverticulitis
Heart & Circulation
- Heart disease
Infections
- Impetigo
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Most searched procedures
- Annual physical
- Blood test
- Flu shot
- Medicare wellness visit
- Sick visit
- TB test
- Well-woman exam
Preventive and evaluation
- Medication management
- Post-hospital transitional care
Screening and diagnostic testing
- EKG
- Spirometry
Bones & Joints
Brain and nerves
Cancer screening
- Colon Cancer Screening Referral
- Mammogram Referral
Digestive
- Endoscopy
Exams & Consultations
- Pre-Op Clearance Exam
Heart & Circulation
- Blood Pressure Check
- Heart monitor
Heart health
- Cardiac Stress Test Referral
Imaging referral
- Abdominal Ultrasound Referral
Immunizations
Lab tests
- Urinalysis
Lungs & Breathing
- At-Home Sleep Study Order
Metabolic & Weight
- Weight Loss Injections and Medication
Minor procedures
- Ingrown toenail removal
- Suture removal
Office procedures
- Cryotherapy for skin lesions
- Earwax removal
- Incision and drainage of an abscess
- Skin biopsy
Office Procedures
- Skin Tag and Mole Removal
- Vitamin B12 Injections
- Wart Removal
Pain management
Preventive & Routine Care
Screenings & Diagnostics
- Bone Density Scan Referral
- Diabetes Screening and A1C Test
Sexual health
- STI Testing
Procedures Most Often Billed to Medicare
92,805 services · 2,178 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
978 | More often than most peers in Internal Medicine |
| Nuclear medicine study whole body with ct scan | Imaging | 78816 |
108 | Too few peers to compare |
| Nuclear medicine study from skull base to mid-thigh with ct scan | Imaging | 78815 |
103 | More often than most peers in Internal Medicine |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
354 | More often than most peers in Internal Medicine |
| Administration of chemotherapy into vein, 1 hour or less | Treatment | 96413 |
293 | More often than most peers in Internal Medicine |
| Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less | Treatment | 96367 |
291 | More often than most peers in Internal Medicine |
| Injection, darbepoetin alfa, 1 microgram (non-esrd use) | Drug given | J0881 |
39,700 | More than most peers in Internal Medicine |
| Injection, ferric carboxymaltose, 1 mg | Drug given | J1439 |
12,000 | Less often than most peers in Internal Medicine |
| Injection, pembrolizumab, 1 mg | Drug given | J9271 |
9,400 | As often as other peers in Internal Medicine |
| Injection, nivolumab and relatlimab-rmbw, 3 mg/1 mg | Drug given | J9298 |
7,360 | Too few peers to compare |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other internists in San Marcos 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Temple University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1980 at Temple University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Edward F. McClay specialize in?
Edward F. McClay is an internist in San Marcos, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where is Edward F. McClay located?
Edward F. McClay is listed at 838 Nordahl Rd Ste 300, San Marcos, CA 92069. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Edward F. McClay's phone number?
The number on file is (760) 747-8935. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Edward F. McClay?
Edward F. McClay's National Provider Identifier is 1497727465. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Edward F. McClay train?
Edward F. McClay attended Temple University School of Medicine, graduating in 1980. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Edward F. McClay have?
Edward F. McClay has 46 years experience. Calculated from a graduation year of 1980, reported in the CMS National Downloadable File.
CMS public data
What does Edward F. McClay do most often?
According to Medicare billing data, Edward F. McClay performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as nuclear medicine study whole body with ct scan and nuclear medicine study from skull base to mid-thigh with ct scan; provides treatments such as injection of drug or substance under skin or into muscle and administration of chemotherapy into vein, 1 hour or less, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Edward F. McClay's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Edward F. McClay. If this is you, claiming it is free.
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