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- 250 Bon Air Rd, Greenbrae, CA 94904
About Dr. Nellen
James R. Nellen, MD practices anesthesiology in Greenbrae, CA. James is also listed as specializing in anesthesiology — pain medicine. According to Medicare claims data, James cared for 158 Medicare patients across 160 services. The services billed most often include anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope, insertion of artery tube for blood sampling or infusion through skin, and injection of local anesthetic for abdominal wall pain control on both sides using imaging guidance. The provider's National Provider Identifier (NPI) is 1174086748.
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
- (415) 925-7100
- Email not available
Practice Locations
250 BON AIR RD
Greenbrae, CA 94904
Conditions Commonly Evaluated or Treated
Within Anesthesiology 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
Anesthesia complications
Back & spine
- Arthritis of the spine
- Degenerative disc disease
- Failed back surgery syndrome
- Herniated disc
- Lower back pain
- Neck pain
- Sacroiliac joint pain
- Spinal compression fracture
- Spinal stenosis
- Spondylolisthesis
- Tailbone pain
- Upper Back Pain
Chronic pain
Facial & jaw pain
General pain
Head & facial pain
Headaches
Joint pain
Mental health
Muscle pain
Musculoskeletal pain
Nerve pain
- Abdominal wall nerve pain
- Complex Regional Pain Syndrome
- Foot Numbness and Tingling
- Groin nerve pain after hernia surgery
- Nerve damage after surgery
- Neuropathy
- Outer thigh burning and numbness
- Phantom limb pain
- Pinched nerve
- Piriformis syndrome
- Sciatica
- Shingles pain
- Tarsal Tunnel Syndrome
Pelvic pain
Post-surgery recovery
Sedation & anesthesia
Spine pain
Procedures & services
Ablation
Head & facial procedures
Implants & devices
- Pain pump implant
- Pain pump refill and check
- Peripheral nerve stimulator implant
- Spinal cord stimulator implant
- Spinal cord stimulator trial
Infusion therapies
Infusion therapy
Joint injections
Muscle injections
Nerve blocks
- Abdominal Nerve Block
- Celiac Plexus Nerve Block
- Ganglion impar block
- Groin nerve block
- Pudendal nerve block
- Superior hypogastric plexus block
Nerve injections
- Celiac plexus block
- Lumbar sympathetic block
- Nerve block
- Rib nerve block
- Shoulder nerve block
- Stellate ganglion block
Nerve procedures
Pain relief procedures
Regional anesthesia
Sedation
Sedation & anesthesia
- General anesthesia
- Labor epidural
- Moderate dental sedation
- Pre-surgery anesthesia consult
- Sedation for dental work
- Spinal spinal block
Spine injections
- Epidural steroid injection
- Facet joint injection
- Medial branch block
- Sacroiliac joint injection
- Tailbone epidural injection
Spine procedures
Procedures Most Often Billed to Medicare
160 services · 158 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of artery tube for blood sampling or infusion through skin | Procedure | 36620 |
21 | As often as other peers in Anesthesiology |
| Injection of local anesthetic for abdominal wall pain control on both sides using imaging guidance | Procedure | 64488 |
18 | As often as other peers in Anesthesiology |
| Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) | Procedure | 64415 |
18 | As often as other peers in Anesthesiology |
| Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) | Procedure | 64447 |
12 | Less often than most peers in Anesthesiology |
| Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | Anaesthesia | 00731 |
22 | As often as other peers in Anesthesiology |
| Ultrasonic guidance for blood vessel access | Imaging | 76937 |
15 | Less often than most peers in Anesthesiology |
| Anesthesia for x-ray or radiation therapy | Anaesthesia | 01922 |
15 | As often as other peers in Anesthesiology |
| Anesthesia for procedure for total knee joint replacement | Anaesthesia | 01402 |
14 | Less often than most peers in Anesthesiology |
| Anesthesia for lens surgery | Anaesthesia | 00142 |
14 | Less often than most peers in Anesthesiology |
| Anesthesia for other procedure on large bowel using an endoscope | Anaesthesia | 00811 |
11 | Less often than most peers in Anesthesiology |
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 anesthesiologists at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
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 — 29 related providers in 4 groups
Other anesthesiologists in Greenbrae 5
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2019 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of artery tube for blood sampling or infusion through skin 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Nellen specialize in?
Dr. Nellen is an anesthesiologist in Greenbrae, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Anesthesiology”.
NPI registry
Where is Dr. Nellen located?
Dr. Nellen is listed at 250 Bon Air Rd, Greenbrae, CA 94904. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Nellen's phone number?
The number on file is (415) 925-7100. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Nellen's NPI number?
Dr. Nellen's National Provider Identifier is 1174086748. 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. Nellen go to medical school?
Dr. Nellen attended Other, graduating in 2019. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Nellen been practicing?
Dr. Nellen has 7 years experience. Calculated from a graduation year of 2019, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Nellen do most often?
According to Medicare billing data, Dr. Nellen performs procedures including insertion of artery tube for blood sampling or infusion through skin, injection of local anesthetic for abdominal wall pain control on both sides using imaging guidance and injection of anesthetic agent and/or steroid into arm nerve bundle; reads or performs imaging such as ultrasonic guidance for blood vessel access; provides treatments such as anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope and anesthesia for x-ray or radiation therapy. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Nellen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Nellen. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.