Physician Profile
Oscar H. Grandas, MD
Unclaimed ProfileAbout Dr. Grandas
Based in Knoxville, TN, Oscar H. Grandas, MD is listed in the NPI registry under vascular surgery. Oscar is also listed as specializing in transplant surgery. According to Medicare claims data, Oscar cared for 812 Medicare patients across 896 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, ultrasound study of arm or leg veins with compression and maneuvers, and ultrasound of both sides of head and neck blood flow. NPI 1366550014 identifies this record in the national registry.
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
- (865) 305-8040
- Email not available
Practice Locations
1940 ALCOA HWY STE E 120
Knoxville, TN 37920
Conditions Commonly Evaluated or Treated
Within Vascular Surgery 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
Aneurysms
Aortic disease
Artery conditions
Artery disease
- Cold Sensitive Fingers and Toes
- Fibromuscular Dysplasia
- Mesenteric ischemia
- Narrow kidney artery
- Subclavian Steal Syndrome
Artery inflammation
Blood clots
Congenital vascular disorders
Dialysis
Digestive & abdominal
Emergencies
Foot & toe conditions
Leg & foot pain
Nerve & vessel compression
Skin & vein conditions
Vascular malformations
Vascular tumors
Vein conditions
Vein disease
Wounds & sores
Wounds & ulcers
Procedures & services
Most searched procedures
- Bypass surgery
- Carotid endarterectomy
- Sclerotherapy
- Spider vein removal
- Varicose vein treatment
- Vein ablation
Amputation surgery
Aneurysm repair
- Complex Branched Aortic Aneurysm Repair
- Minimally Invasive Aneurysm Repair
- Open Aortic Aneurysm Surgery
- Popliteal Aneurysm Repair
- Pseudoaneurysm Injection Repair
- Thoracic Endovascular Aortic Repair
- Visceral Aneurysm Coiling
Artery procedures
- Atherectomy
- Balloon Angioplasty for Legs
- Carotid Artery Stent
- Leg Artery Stent
- Limb Salvage Surgery
- Mesenteric Artery Stenting
- Renal artery stenting
- Transcarotid Artery Revascularization
Artery surgery
Blood clot treatments
Blood clots
- Blood Clot Removal Surgery
- Catheter Clot Dissolving Treatment
- IVC Filter Placement
- IVC Filter Removal
Diagnostic procedures
Diagnostic tests
Dialysis access
Emergency surgery
Imaging & diagnostics
- Carotid Ultrasound
- Leg Circulation Test (ABI and Arterial Doppler)
- Leg Vein Ultrasound
- Peripheral Angiogram
Nerve & vessel compression
Nerve surgery
Vascular access
- Chemo port placement
- Chemo port removal
- Dialysis Catheter Removal
- Tunneled Dialysis Catheter Placement
Vascular malformation treatments
Vein procedures
Vein treatments
Wound care
Procedures Most Often Billed to Medicare
896 services · 812 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist | Procedure | 36902 |
52 | More often than most peers in Vascular Surgery |
| Balloon dilation of dialysis segment with review by radiologist | Procedure | 36907 |
22 | As often as other peers in Vascular Surgery |
| Insertion of tunneled central venous tube for infusion (5 years or older) | Procedure | 36558 |
19 | More often than most peers in Vascular Surgery |
| Insertion of needle and/or tube into hemodialysis circuit with review by radiologist | Procedure | 36901 |
17 | As often as other peers in Vascular Surgery |
| Replacement of tunneled central venous tube | Procedure | 36581 |
15 | Too few peers to compare |
| Insertion of non-tunneled central venous tube for infusion (5 years or older) | Procedure | 36556 |
12 | Less often than most peers in Vascular Surgery |
| Transplantation of donor kidney | Procedure | 50360 |
11 | Too few peers to compare |
| Ultrasonic guidance for blood vessel access | Imaging | 76937 |
34 | As often as other peers in Vascular Surgery |
| Fluoroscopic guidance for insertion or removal of central vein access device | Imaging | 77001 |
30 | More often than most peers in Vascular Surgery |
| Ultrasound study of arm or leg veins with compression and maneuvers | Treatment | 93970 |
95 | More often than most peers in Vascular Surgery |
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.
Other vascular surgeons at this location 3
Same specialty, same street address — most likely the same department or group.
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.
More connections — 30 related providers in 4 groups
Other vascular surgeons in Knoxville 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1986 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist 7
Providers in TN who bill this service to Medicare most often.
Common questions
What does Dr. Grandas specialize in?
Dr. Grandas is a vascular surgeon in Knoxville, TN. That is the designation recorded for this NPI in the federal registry, where it is listed as “Vascular Surgery”.
NPI registry
Where is Dr. Grandas located?
Dr. Grandas is listed at 1940 Alcoa Hwy Ste E 120, Knoxville, TN 37920. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Grandas's phone number?
The number on file is (865) 305-8040. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Grandas's NPI number?
Dr. Grandas's National Provider Identifier is 1366550014. 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 Dr. Grandas go to medical school?
Dr. Grandas attended Other, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Grandas been practicing?
Dr. Grandas has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Grandas do most often?
According to Medicare billing data, Dr. Grandas performs procedures including insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist, balloon dilation of dialysis segment with review by radiologist and insertion of tunneled central venous tube for infusion; reads or performs imaging such as ultrasonic guidance for blood vessel access and fluoroscopic guidance for insertion or removal of central vein access device; provides treatments such as ultrasound study of arm or leg veins with compression and maneuvers and ultrasound of both sides of head and neck blood flow, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Grandas confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Grandas. If this is you, claiming it is free.
Guide.md
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